I'M STARTING TO RENEW THE LINKS AS MOST HAVE CHANGED :( HOWEVER ALL OF MY TEXT IS CORRECT STILL!..
Adaptations
These are the FEATURE of an organism made to BEST SUIT it's ENVIRONMENT. If the environment changes, a species needs to adapt or it will become disadvantaged and probably extinct. Adaptations are caused by a mutation of the organism's genes. If the mutation is beneficial, then it will pass on the mutated gene to future generations, therefore evolving the species as this adaptation becomes the norm and other less beneficial version of the gene will die out.
When describing the adaptation don't forget to refer to WHAT in that HABITAT it is ADAPTING to
When describing the adaptation don't forget to refer to WHAT in that HABITAT it is ADAPTING to
Indicators of Pollution
These are organisms which can be used to determine how POLLUTED an environment is by HOW MANY of these organisms are present. A common indicator of AIR POLLUTION is LICHEN, the more Lichen there are the less polleted the air is. Whereas sludgeworms and fly lavae can indicate if a river is polluted as they will have a large population and larger fish, such as trout and salmon will be sparse
Variation
DIFFERENCES between members of the SAME SPRECIES are CONTROLLED by their GENES and/or the ENVIRONMENT. A good example to explain this is using identical twins, as they are from the same egg and sperm cell their DNA is exactly the same... Yet sometimes they are different. Take the picture to the left, the girls have different hair styles and one is taller, these differences must be environmental variations rather than genetic.
VARIATION come about by SEXUAL reproduction, this involves two parents COMBINING their GENES to give an offspring which is a MIXTURE of the two parents. The resulting combination is completely RANDOM. ASEXUAL reproduction however only involves one parent so the resulting offspring will be GENETICALLY IDENTICAL to the parent and therefore a CLONE.
VARIATION come about by SEXUAL reproduction, this involves two parents COMBINING their GENES to give an offspring which is a MIXTURE of the two parents. The resulting combination is completely RANDOM. ASEXUAL reproduction however only involves one parent so the resulting offspring will be GENETICALLY IDENTICAL to the parent and therefore a CLONE.
Causes of variation - Genes, Environment or Both
Types of variation - Continuous or Discontinuous/Discrete
Types of Variation
Predator Prey Relationship
There are usually more prey than predators, this is due to, larger predators needing many smaller prey to provide enough energy to keep them alive. As the population of prey goes up the predators population increases as food is more plentiful and there is LESS COMPETITION. If a population gets too large resources get used up due to MORE COMPETITION and organisms starve. Also a large population makes it easy for diseases to spead causing the population size to decrease. This pattern is on going, as shown by the graph above.
Evolution
Two names you will encounter are; Charles Darwin and Jean Baptiste Lamark. LAMARK used giraffe to explain his theory of evolution by saying that the shorter necked giraffe of the past, (Proven by fossil records) would physically stretch it's neck to reach the leaves on higher branches, thus giving them and their offspring longer necks. Therefore saying that parents can pass ENVIRONMENTAL variations on to their offspring (So why aren't baby's born with tattoos etc?) DARWIN however disagreed and said that there is variation among the short necked giraffes of the past, eg. some longer than others, would lead to them having an ADVANTAGE over the shorter necked giraffe.(They could reach more food.) This variation was due to the GENES they carried, as the shorter necked giraffe starved to death, their short neck genes died also. This lead to the longer, more benefical, long neck GENE SURVIVING to be PASSED on to the next generation.
Stages of Evolution
1.All members of a species are the same, showed no variation(eg giraffes necks same length).
2.A MUTATION occurs which gives that individual an advantage. (e.g. access more food, escape predators, resistant to poison or be more attractive)
3.The benificial mutation allows the individual to LIVE LONGER,
4.Reproduce more often, passing on the mutated GENE.
5.More are born with the benificial mutation, so out survive/compete the individuals without the mutated gene.
6.This is NATURAL SELECTION.
These stages are standard, to access more marks apply them to the question.
2.A MUTATION occurs which gives that individual an advantage. (e.g. access more food, escape predators, resistant to poison or be more attractive)
3.The benificial mutation allows the individual to LIVE LONGER,
4.Reproduce more often, passing on the mutated GENE.
5.More are born with the benificial mutation, so out survive/compete the individuals without the mutated gene.
6.This is NATURAL SELECTION.
These stages are standard, to access more marks apply them to the question.
Inheritance and Gene Technology
Covering topics such as Punnett squares, Genetic Transfer/Modification, Genetic disease and DNA profiling. This is a large yet very important topic.
Vocabulary is vital, make sure you understand what gene, hetrozygous, homozygous, homologous, selfing, genotype, phenotype, diploid, haploid, gamete, dominant and recessive mean. Write them down then click on the vocabulary link to check if you are correct.
Vocabulary is vital, make sure you understand what gene, hetrozygous, homozygous, homologous, selfing, genotype, phenotype, diploid, haploid, gamete, dominant and recessive mean. Write them down then click on the vocabulary link to check if you are correct.
Genetics
Stimulus, Receptor, Sensory neurone, Co-ordinator, Motor neurone, Effector, Response
Some Rude Sounds Can Make Everyone Retch! You must know the order of events which bring about a response from a give stimulus. Stimuli include light, sound, chemicals which we can taste and smell, pressure and temperature. These are detected by receptors in the sence organs e.g. eyes, ears, tongue, nose and skin. Then an electrical impulse travels along a neurone to (Sensory) and from (Motor) the co-ordinator (CNS) to an effector, which is either a muscle or a gland this will bring about a response.
Cross section of the skin
(Click to enlarge) learn the labels (given in class) and understand their function in thermoregulation
Vasoconstriction vs vasodilation
Capillaries narrow or widen to control blood flow, the blood vessels do not move! (Click to enlarge)
Health
Healthy living is needed for a longer life as it can help prevent cancer, STi's, obesity and heart problems. In order to keep healthy you should have a balanced diet, take exercise regularly and keep away from drugs such as caffine, nicotine, alcohol and illegal drugs such as solvents, depressents and stimulants.
Be aware that drugs are different from medicines in that drugs effect the brain whereas medicines do not. Medicines however need to be tested before treating humans therefore animal testing is often used, which gives rise to ethical issues.
Be aware that drugs are different from medicines in that drugs effect the brain whereas medicines do not. Medicines however need to be tested before treating humans therefore animal testing is often used, which gives rise to ethical issues.
Gene Therapy
Human Impact on the Environment
As one of, if not the most influencial organisms on the planet, humans have a huge impact, mainly bad, on the planet. Between ridding the earth of its natural resources, pollution of the air, water and land, the extinction of organisms all over the globe and the unbalance of the natural cycles, humans are selfish in the way they manipulate other organisms to suit their needs.
Campaigns and Human Influence
- SEPERATE SCIENCE LOOK HERE
- Human Influences on the Environment
- Intensive Farming Activity
- SSSi's
- CITIES
- Badgers vs bTB in Cattle
- Millenium Seed Bank
- Sustainable Development
- Organic farming (Pages2+4)
- Intensive Farming
- Organic vs Intensive Farming
- Biodiversity and the Destruction of Habitats
- Environmental Glossary
Balanced Diets and General Health
Drugs are bad mmm' kay!
You've finished!!! Good Luck
Well thats all of the topics needed for the Core, the only other thing you may like to use is the revision guide with check list and syllabus which follows. Any questions don't hesitate to ask me questions in the comment and question area at the bottom of the blog.
Test yourself with the past paper too unfortunately I cant link the mark schemes, sorry
Test yourself with the past paper too unfortunately I cant link the mark schemes, sorry
Past Papers
- B1 Jan 07 Foundation
- B1 June 07 Foundation
- B1 Jan 08 Foundation
- B1 June 08 Foundation
- B1 Jan 09 Foundation
- B1 June 09 Foundation
- B1 Jan 10 Foundation
- B1 June 10 Foundation
- B1 Jan 11 Foundation
- B1 Jan 07 Higher
- B1 June 07 Higher
- B1 Jan 08 Higher
- B1 June 08 Higher
- B1 Jan 09 Higher
- B1 june 09 Higher
- B1 Jan 10 Higher
- B1 June 10 Higher
- B1 Jan 11 Higher
Cells
Now, you should be aware of the labels associated with animal and plant cells, if not click on the link below. Understanding what role each part plays is also needed!
There are links to explain how substances move into and out of the cell, through the selectively permeable membrane. These processes are called diffusion, osmosis and active transport.
Also the cells you have learned to label are generalised cells, most cells are specialised so have a particular function. Keywords you must learn are differentiated cells, which are specialised, and undifferentiated cells, with no particular function known as stem cells.
Cells and movements across the s/p membrane
How Do Plants and Animals Grow?
Remember Mitosis?
Here you will look at how plants and animals differ in the way which they grow. Mitosis is the cell division which brings about growth and repair, plants are limited to the location of mitosis (meristems), however their cells retain the ability to differentiate if needed, which is how they can grow roots from their stems when we take cuttings. Animals however can perform mitosis in every cell which has a nucleus, yet if they are specialised, so differentiated, they can not change their function.
Growth is limited in plants by the ability to get water from it's roots to the tips of it's branches, where animals are limited to how well they can support themselves and how efficient their circulatory system is.
Enzymes - Biological Catalysts
Enzymes are made of proteins and speed up reactions within the body. Their names end in 'ase' and usually contain part of the name of the substrate (molecule) they are breaking down. E.g. carbohydrase, protease, lipase and urease. Other examples you should know are catalase, which breaksdown Hydrogen Peroxide and amylase, a carbohydrase specifically used on starch. Enzymes are specific to a particular molecule due to their active site. This shape is unique to the enzyme and substrate and is often described as being like a lock and key. If the enzyme is placed in an inhospitable environment, too hot or of an extreme pH, then the active site will denature, change shape, and the enzymes rate of reaction will slow and eventually not work at all.
Enzyme Action
Respiration
This is how the body releases energy from the glucose you eat. Performed in the mitochondria of cells, respiration can be with (aerobic) or without (anaerobic) oxygen. Aerobic respiration releases the most energy as is fully breaksdown glucose, using oxygen, to give carbon dioxide and water. Anaerobic respiration however is the incomplete breakdown of glucose to form lactic acid. This is due to the absence of oxygen and results in an oxygen debt being built up, which needs to be repaid if you are to breakdown the toxic lactic acid fully, to form carbon dioxide and water. As a consiquence anaerobic respiration releases less energy than aerobic respiration. It is important to note that respiration is NOT breathing. They are linked in that breathing takes in air, containing the oxygen needed for respiration and releases the carbon dioxide and water vapour produced (as by-products of respiration).
Cellular Respiration
Digestion
You need to be able to name and understand the components of a balanced diet, name their enzyme (If they have one) and any nutrients produced by this breakdown. The name of the game is to make large insoluble molecules into small soluble molecules, so they can pass (be absorbed) through the small intestine into the blood. Carbohydrates, Proteins and Fats (Lipids) are too large to be absorbed so their corresponding enzymes break them down into Simple sugars, Amino acids and Fatty acids and glycerol respectively. Vitamins and Minerals are already small and soluble so they are rapidly absorbed into the blood, (So is alcohol and the glucose from sweets). Fibre however is not brokendown and therefore passes through the alimentary canal unchanged, so helps prevent us from being constipated. Lastly Water, essential for all biochemical reactions passes into the blood by osmosis.
Breaking up is hard to do
Food tests
Photosynthesis
All organisms perform the 7 life processes known as MRS GREN. Photosynthesis is part of the Nutrition processes, where plants make their own food using sunlight and chlorophyll (found in the chloroplasts of their cells) to combine carbon dioxide, from the air, and water taken in from the soil, by their roots, to make glucose and as a reasult oxygen is released back into the atmosphere... Luckily for us.
Plants
Interdependence of Organisms
Food chains and more realistically food webs show how energy, originally from the sun (source) can be passed from plants (Photosynthesis) to animals (feeding) and from animals to other animals. This flow of ENERGY is represented by an ARROW and the use of vocabulary to describe the different organisms is critical in recognising the relationships between these organisms.
The Circle of Life! Two cycles need to be understood, Carbon and Nitrogen to fully appreciate how much influence every organism can have on each other.
The Circle of Life! Two cycles need to be understood, Carbon and Nitrogen to fully appreciate how much influence every organism can have on each other.
Ecology
You've Finished, Good Luck!
You've come to the end of the Additional Biology revision, to follow is an additional site which may be of use and the WJEC Syllabus for you to use as a check list. At the bottom of the blog is a link to comments and questions where you can message me and I'll answer any questions you have as quickly as I can. Good Luck!
More Past Papers
End of Revision
Revision guides for B1, B2 and B3
Transpiration in Plants
Transpiration is the movement of water though the xylem vessels of the plant from the roots to the leaves. Water leaves the plant via evaporation, through the stomata in the leaf. There are a number of reasons for transpiration; to cool the plant, provide water fot photosynthesis to occur and to provide nutrients for the plant to grow healthily, it also provides the plant with support-turgidity
The Movement of Water Through a Plant
The Circulatory System
All larger, multicellular organisms need a circulatory system, to supply all the cells of the body with oxygen and glucose for respiration and remove the carbon dioxide produces before it becomes toxic. Consisting of a heart to pump the blood around the body through blood vessels. Blood vessels involved are arteries, capillaries and veins. Arteries take blood Away from the heart, veINs take blood back INto the heart while capillaeries connect the two and are so thin they allow gaseous exchange between cells and the blood.
The Heart and Associated Blood Vessels
The Blood
The Kidneys
As part of the urinary system, the kidneys clean the blood and help maintain homeostasis of water salts and glucose. The kidneys are connected to the bladder, where urine is stored, by ureters and urine is released from the body throught the urethra. The kidneys are made up of an outer cortex, medulla and pelvis. One million nephrons per kidney are positioned in the cortex and medulla and direct excess salts and water into the pelvis which leads to the ureter.
Nephrons begin with the Bowman's capsule, where ultrafiltration is used (high pressure filtering of the blood through a capillary knot into the nephron) this rids the blood of all the salt, water, glucose and urea, then selective reabsorption from the loop of Henle controls how much water, glucose and salt goes back into the blood. Excess water, salt and most of the urea is sent down the collecting duct to the pelvis of the kidney and is now called urine.
Nephrons begin with the Bowman's capsule, where ultrafiltration is used (high pressure filtering of the blood through a capillary knot into the nephron) this rids the blood of all the salt, water, glucose and urea, then selective reabsorption from the loop of Henle controls how much water, glucose and salt goes back into the blood. Excess water, salt and most of the urea is sent down the collecting duct to the pelvis of the kidney and is now called urine.
The Urinary System
Kidney Problems
Even though there are two kidneys, you only really need one. There are a number of reasons why your kidneys may become damaged, Cancer, infection, Diabetes, High Blood Pressure, all of which could lead to you needing to find an alternative method of cleaning your blood, other than your own kidneys.
There are two methods you need to learn about, Dialysis and Kidney Transplant.
There are two methods you need to learn about, Dialysis and Kidney Transplant.
Dialysis - Time consuming
Kidney Transplant
The Nervous System
This section covers the bodies internal responses (Electrical impulses) to external changes (Stimuli) and how these changes come about. From cooling the body when it gets too hot to heating up the body or retaining heat when you get too cold. Looking at the differences between voluntary actions and involuntary (reflex) actions. Also the control of blood glucose levels using the Pancreas and the hormone Insulin
Microbes
Microorganisms are living organisms that are individually too small to see with the naked eye. The unit of measurement used for microorganisms is the micrometer (μ m); 1 μ m = 0.001 millimeter. Which means you need a microscope to see them.Microbes include Bacteria, Viruses and fungi.Fungi are the largest where bacteria are smaller and viruses are smaller again, however if there are enough of them you don't need a microscope then.
Microorganisms are found everywhere and are essential to many of our planets life processes. With regards to the food industry, they can cause spoilage, prevent spoilage through fermentation, or can be the cause of human illness. We can use bacteria in food preparation eg yoghurt, cheese production, also they are essential for life on the planet eg used in the Carbon and Nitrogen cycles. Fungi are also used to benifit humans eg bread and alcohol production also as decomposers, where penicillium is used to make the anti-biotic penicillin.Viruses however have NO use to us and only cause disease, a disease causing organism is refered to as a pathogen.
Microorganisms are found everywhere and are essential to many of our planets life processes. With regards to the food industry, they can cause spoilage, prevent spoilage through fermentation, or can be the cause of human illness. We can use bacteria in food preparation eg yoghurt, cheese production, also they are essential for life on the planet eg used in the Carbon and Nitrogen cycles. Fungi are also used to benifit humans eg bread and alcohol production also as decomposers, where penicillium is used to make the anti-biotic penicillin.Viruses however have NO use to us and only cause disease, a disease causing organism is refered to as a pathogen.
Gaining Immunity
Your immune system relies on your blood and more specificaly you white blood cells to fight any foreign bodies which may get past your external protective barriers. These barriers include the skin, mucus, acid hairs. White blood cells can be divided into phagocytes and lymphocytes, which can be divided further into T-Cells and B-Cells. Remember B-Cells make anti-bodies, T-Cells attack. The memory cells which remain provide the immunity.
The Immune System
Useful Products and Uses of Microbes
We can exploit microbes to produce many useful products, such as alcohol, bread, cheese, antibiotics, yoghurt, soya, biogas etc. Also we can use microbes to clean sewage, use as a vector for gene therapy and to allow gene splicing (high production of proteins by insertion of a gene into the bacterial DNA, i.e. Insulin)
Uses of Microbes
Scientists you should know about
3 microbiologists you need to recognise are Pasteur, Flemming and Jenner. you must also be aware of the contributions made by them to science.
Where would we be without them?
Enzymes
Enzymes are Biological Catalysts which work at an optimum rate in certain environments, they can be denatured at high temperatures and are highly specific to the substrate they breakdown (or build up), all of which you studied in B2. Enzymes are useful in industry as they require less energy for a reaction to occur and therefore save companies money, and often result in a higher yeild which makes companies more money. Examples are pectinase in fruit juice producion, protease in baby food manufacturing and washing powders.
The Uses of Enzymes in Industry
Past Papers Again
Some useful websites for Science GCSE, Biology, Chemistry, Physics, Years 10, 11 and Separates
Subscribe to:
Post Comments (Atom)
.htm&usg=__VIfhCE2_9YyOiaI2qahIJqgoiGA=&h=738&w=1024&sz=507&hl=en&start=7&tbnid=fxkzGIiv1R0QsM:&tbnh=108&tbnw=150&prev=/images%3Fq%3Dhomeostasis%26gbv%3D2%26ndsp%3D18%26hl%3Den%26sa%3DN){kind=link}
.htm&usg=__c0wq26VnjynGMFy-Vx9Mtd_PljE=&h=738&w=1024&sz=495&hl=en&start=28&tbnid=YrepR-kpAt8hBM:&tbnh=108&tbnw=150&prev=/images%3Fq%3Dhomeostasis%26start%3D18%26gbv%3D2%26ndsp%3D18%26hl%3Den%26sa%3DN){kind=link}
 shows the test for starch: when iodine solution is added, the solution turns blue-black if starch is present; (2) shows the test for sugar: when Benedict){kind=link}
50 comments:
hey miss wheres all the b2 stuff? is it under the big headings?
ash
Hi, how exciting, my first message!
B2 is the Additional stuff starting with cells. Its next to the picture of the drugy woman. Just click on the orange underlined sentences to access the links. Hope it's all going well!
"drugy woman"
nice use of words miss
ED
I say what I mean what can I say! :)
LMAO to el and miss lmao
haha druggy woman
dun 2 hours revision 2day :)
good luck for tomorrow everyone, :) up late learning the nitrgen cycle :(
shoudl i freeze the heart i got, i only just got it 2day? or should i do something else? and btw he give me a lung aswell hahahaha lol
Miss. i'm rather stuck on the investigation with the fermentation in yeast. shall i just leave it and talk to you about it in school or have you got any decent sites you can recommend? thanks.
Jack :]
Hello, i'm trying to complete the Microbes Hight Test. There is one question on there and I am mighty stuck :( I can't find anything to answer it. The question is:
8)the diagram shows part of the immune repsonse follwoing an infection with the measles virus.
(There is then a diagram showing a white blood cell at the top and then they divide and they want me to name this :\ )
I should've asked you yesterday
Amy =]
Hi Amy,
The division is mitosis of a memory cell which then makes the B cells that will produce the antibodies which are complimentary to (fit) the (known) microbes antigens.
Miss Morgan has mark schemes for all of the papers which you don't have mark schemes for.
Any more questions don't hesitate to write back.
Good luck,
Mrs Priddey
Hi Miss. some people are saying that you are coming in tomoro to do a revision session before our exam ..... is this true??
Otheriwse i'm just gonna stay at home and work!
thanks
Jack :]
Hey Jack sorry I didn't get back to you, just logged on.
Well everyone, what did you think? Miss Morgan read the paper to me, I think it was a lovely paper, I REALLY hope you did too. Please let me know.
Its been a pleasure teacting all of you GOOD LUCK with EVERYTHING life throws at you
TAKE CARE Mrs P
awww thanks miss :P yh i thought it was a nice paper too, b2 wasnt so nice though i thought! bit hard! but hopefully got me enough credits for an A or even A* :P
No prob, glad to hear you're optamistic!!Miss Morgan said you pulled a face when she saw you in the exam, gathered that was with regards to the B2 paper, I haven't seen that one yet will get it off miss on Sun. Have a rest tonight and good luck with the others.
Lovely paper???? well i think some of the questions were sstupid lol! :S but there were also some nice ones lol! i can't believe i thought the very forst question was stomata not XYLEM i changed it and changed it back again :@ not happy about tha lol! =]
It was only one mark so don't fret about that, surely there were two questions involving reading data, the indicator question gave u all the info u needed. U had to draw a graph, we talked about dialysis fluid yesterday, and the blood pressure question should have been straight forward? I'll fill in the paper when Miss Morgan gives them to me on Sun. Have a nice break, thanx for letting me know how u got on, although I'm slightly apprihensive now :o(
well i thought the heart question could have been easier ..... well .... saying tthat, i justs didn't like these qestions ...
name an antibiotic resistant bactrerium? why lung capilairies have less pressure than capillaries in the body? from the diagram ... what evidence is there to show that enzymes are responsilbe for somethin in the fermenter? apart from those ... i found the rest ok.....however for all the questions i was a bit confused at ... i wroet as much as i could which seemed logical in the hope of getting some marks lol! =] ok that would b cool!
That sounds like only a few marks on a 50 mark paper so don't worry! I'm seeing the paper tomorrow at Miss Morgans so I'll have a better idea then. Post mortems on papers are never wise as you can't do anything about it anyway. Please don't worry, I'm sure you'll be fine.
Best wishes, see you soon,
Mrs Priddey
Hey Mrs P (:
Just thought I'd say how much all the stuff you taught us has helped with A level so far!! Doing the digestive system at the mo and we seem to know a lot more in depth stuff than the others!!
Bio is going fab!! :)
So thank yooooo!!
Nichol xx
Hey Miss,
What are we gonna do about the after school session if we're not in school on Thursday?
Em Yip
Hiya,
There wont be one unfortunatly but we will re-schedule, that goes for Saturday too if were not in on Friday.
Can you please spread the word as much as you can as I dont have any contact details for anyone.
Thanx, if u could remind people about the blog too that would be amazing
Enjoy the snow :)
Hiya Miss!
The caerphilly website says No School Tomorrow.
Does that mean no revision on saturday?
Blair :)
Oops! Sorry!
Just read your comment above!
Blair :)
No problem,
Please spread the word and remind people about the blog, Ill remburse any credit u spend. Have some fun as well as all the work I know ur doing, hopefully c u Monday, although its looking doubtful :(
hey mrs prid
im havin trouble on the ecology and human impact topis espescially on
bdger and ptb and there was a question in a past paper on why salmon fishing is more economic method then battery chickens which reeli stumped me pleas help
daniel mock
mrs prid
stuck on badger and btb relations with catlle
and im stuck on a pp question why is cageing salmon fishing more economic method than battery hickens?
daniel mock
Hi Dan, Wat you have to think is that salmon are already in an environment, where as you have to provide Battery hens with a place to live, warmth, food etc. The salmon will have alot of their food swimming to them through the gaps in the cage and the sea will be the correct temp etc.
As for the Badgers here is the mark scheme answers for more info google 'defra'
5 (a) (i) because badgers could move into the area/new areas /
because of the movement of cattle between herds/one farm to
another. [1]
(ii) because it would remove a possible source of the infection in
cattle/cattle can be infected by badgers. [1]
(b) badgers are protected by law / they consider the evidence is unreliable/culling
doesn’t control bTB/farmers could do more to protect their herds
vaccination/ref. animal rights or inhumane [1]
(not: ref. endangered species/extinction of badgers/cruelty)
(c) vaccination / more reliable (tuberculin) testing /check cattle when sold/ more
control on cattle movement/culling infected herds. [1]
(not: killing cattle)
Hope that is ok
miss,
i wasnt in this school last year, so do i sit this exam on thursday ?
Yes, but dont panic.
Your going to do the foundation level which gives you ALOT of the answers on the paper.
Use the blog and go to the past paper section for B1. Even without revision you will be able to answer at least half marks.
REVISE - Evolution and the stages of evolution, understand Latin is a universal language so everyone understands what eachother is saying, no matter what their language is (English, German, French etc) And the name consists of TWO words the Genus name AND Species. these questions usually come up.
Please have a go on a few past papers itll prove to you how much is given to you, any questions please write back - GOOD LUCK!
Hiya Miss.
What is the exact definition for Bioaccumalation?
Thanks :)
Hi Blair, blinkin snow!!
Bioaccumulation is when some toxins accumulate/build up along food chains until the top predator has very high, often lethal, amounts in its body.
Hey Miss,
I hope you don't mind me leaving a comment because you don't teach me anymore :(
I was just wondering how detailed are the questions that could come up on Health, because I seem to have more notes on that than any other topic?
Em :)
hey miss,
i was looking over the past papers on the blog early and one thing that always seem to come up is latic acid. Please can you tell me what i need to know about latic acid and what we need know about the sports side of it.
thomas shipp.
Hi Emily, of course I dont mind.
Health is a relitivly large topic second only to inheritance which is huge.
It covers Gene Therapy and genetic councelling, obesity, food labelling, the effects of smoking and how peoples views have altered over the years, drugs and alcohol abuse.
The sylabus is at the bottom of the additional, B2 notes starting on page 19 for B1 if you have lost yours that will tell you exactly what it is you need to learn.
Dont hesitate to write back if you need to. GOOD LUCK
Hi Thomas,
Lactic acid is produced by anaerobic respiration when glucose is not fully broken down (due to there being no oxygen). An oxygen debt is created due to the creation of lactic acid this causes cramp in the muscles so you stop exercising, therefore start respiring aerobically and pay back the oxygen debt. This then allows the lactic acid to be broken down into carbon dioxide and water.
Hope thats ok, glad to see your revising GOOD LUCK
Hi Mrs Priddey,
I'm Joshua Daniel's mum and he has told me he does not have to sit the biology exam tomorrow as he already sat this in year 10.Joshua is in 11m1 and set2 for biology.PLeasecan you confirm this for me.
Thanks
Mrs S.Daniel
Hi Mrs Daniel,
Yes, Joshua is correct, he got full marks in B1 so the next exam he will sit in Biology is B2 and this will be in the Summer.
Hey Miss, thank you for the help :) but i knew it would be my luck that health wouldn't come up on the paper :(
The B1 Highter Tier paper was fair i thought, not too hard not too easy but the questions did need a bit of thinking. Just hope the results turn out alright now :)
Thank you!
Emily :)
Typical but it's better to be safe than sorry. I'm glad you found it ok, thanx for the feedback
Hello Miss =]
Something on the b2 paper has been bugging me...there was a question about bioaccumulation with pesticides in a lake. Anyways, the question was to explain the presense of:
"Dead fish-eating birds"
Now this stumped me a bit, because I wasn't sure if it meant 'dead birds that ate fish' or 'birds that ate dead fish.'
I figured it it meant the birds that died because the ate the fish with pesticide, but I was a little confused for a bit...
So, if somebody read it the other way, and wrote that 'the birds were there because there were lots of dead fish to eat', would they be technically right?
It's not a big deal, I'm just curious...
Fern
Hi Fern,
Because the name 'fish-eating bird' is hyphenated, it means the bird eats fish so therefore the dead fish-eating bird has died, probably eating fish who carry poison-quite rightly answered as bioaccumulation. The other option would have been called dead-fish eating bird and therefore not been awarded the mark :)
Good luck with your Chem revision
Hi miss, Chloe and Lauren here, were attempting to complete the project on Useful products of Microbes, but were pretty stuck on what to include in our PowerPoint.
we were wondering if you could help us with what sort of information we need.
Chlo + Laur
Hello,
Great information! I’ve been looking for something like this for a while now.
Luciferase Reporter Assay
Thanks!
Mark Holland
Oh I am glad! Unfortunately it's a bit out of date but when the syllabus changes again I'll b sure to update it
Thanx for the comment!
Maggie priddey
Read Invertebrates Class 10 here
There is a safe & effective Natural Herbal Medicine. For Total Cure Call +2349010754824, or email him drrealakhigbe@gmail.com For an Appointment with (Dr.) AKHIGBE contact him. Treatment with Natural Herbal Cure. For:Dengue Fever, Malaria. Painful or Irregular Menstruation. HIV/Aids. Diabetics. Vaginal Infections. Vaginal Discharge. Itching Of the Private Part. Breast Infection. Discharge from Breast. Breast Pain & Itching. Lower Abdominal Pain. No Periods or Periods Suddenly Stop. Women Sexual Problems. High Blood Pressure Chronic Disease. Pain during Sex inside the Pelvis. Pain during Urination. Pelvic Inflammatory Disease, (PID). Dripping Of Sperm from the Vagina As Well As for Low sperm count. Parkinson disease. Obesity, Lupus. Cancer. Tuberculosis. Zero sperm count. Bacteria, Impotence Fertility,Toxoplasmosis, Diarrhea.Herpatitis A&B, Rabies. Asthma. Quick Ejaculation. Gallstone, Cystic Fibrosis, Schizophrenia, Cirrhosis, Premature Ejaculation. Herpes. Joint Pain. Stroke. Cornelia Disease, Weak Erection. Ovarian problem, Erysipelas, Thyroid, Discharge from Penis. Bronchial Problem, HPV. Hepatitis A and B. STD. Staphylococcus + Gonorrhea + Syphilis. Heart Disease. Pile-Hemorrhoid.rheumatism, Impotence, thyroid, Autism, Sepsis Bacteria, Penis enlargement, Prostate Problem, Waist & Back Pain. Male Infertility and Female Infertility. Etc. Take Action Now. contact him & Order for your Natural Herbal Medicine: +2349010754824 and email him drrealakhigbe@gmail.com Note For an Appointment with (Dr.) AKHIGBE.I suffered in Cancer for a year and three months dieing in pain and full of heart break. One day I was searching through the internet and I came across a testimony herpes cure by doctor Akhigbe. So I contact him to try my luck, we talk and he send me the medicine through courier service and with instructions on how to be drinking it.To my greatest surprise drinking the herbal medicine within three weeks I got the changes and I was cure totally. I don't really know how it happen but there is power in Dr Akhigbe herbal medicine. He is a good herbalist doctor.
I was browsing the Internet searching for help when I came across a testimony shared by someone on how she was cured from Herpes Disease. I quickly contacted him to get the cure. I bought the herbal medicine from the herbal doctor [Robinson Buckler]. I took the herbal medicine for 2 weeks as instructed and i went for a medical checkup and to my greatest surprise i was cured from Herpes virus. My heart is so filled with joy. If you are suffering from Herpes or any other disease you can contact this herbal doctor today on this Email address_________________robinsonbuckler@[[yahoo.com]].....Thank you Doctor
Post a Comment