AQA Biology B1 -REVISION THREAD- 17th May 2016 EXAM Watch

akawais
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Hi

Let's make this a REVISION THREAD for the B1 exam. Let's ask questions and answer other members questions too for our own revision. Post messages/hints/tips to help us succeed in our GCSEs and let's ace this first science exam. :-) If you ask an exam question please include the number of marks the question is worth and give feedback to answers which wouldn't achieve full marks so we do the best we can. This is not a substitute for your own revision.

First question: What is the main reason why we should be careful not to over-use antibiotics?[2]
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BobbiBlue
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Over time, bacteria may become resistant to antibiotics due to a random mutation. This bacteria is able to reproduce so current antibiotics will not work. New ones have to be developed.

You should finish your course of antibiotics in order to make sure that all of the pathogens have been killed.


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my.med.journey
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(Original post by akawais)
Hi

Let's make this a REVISION THREAD for the B1 exam. Let's ask questions and answer other members questions too for our own revision. Post messages/hints/tips to help us succeed in our GCSEs and let's ace this first science exam. :-) If you ask an exam question please include the number of marks the question is worth and give feedback to answers which wouldn't achieve full marks so we do the best we can. This is not a substitute for your own revision.

First question: What is the main reason why we should be careful not to over-use antibiotics?
How many marks!?
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akawais
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(Original post by aliceharmer15)
How many marks!?
Sorry 2 marks
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shohaib712
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can somebody answer these 2 questions please???
Do detritus feeders just feed on dead organisms and their waste materials only? or do they also break down/decompose the dead organisms too?

When dead organisms are decomposed by microorganisms - CO2 is returned to the atmosphere when the microbes repire + they also release nutrients in the soil, which are taken up by plants so that they can grow?

Thank you!
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BobbiBlue
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(Original post by shohaib712)
can somebody answer these 2 questions please???
Do detritus feeders just feed on dead organisms and their waste materials only? or do they also break down/decompose the dead organisms too?

When dead organisms are decomposed by microorganisms - CO2 is returned to the atmosphere when the microbes repire + they also release nutrients in the soil, which are taken up by plants so that they can grow?

Thank you!
Detritus feeders break down both waste materials and dead organisms.

What you have said is more or less right.


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dalalaachoui
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(Original post by Rahat.H)
I've got a question, can someone help me on the questions where they give a bird that eats worms during like may and why it decreased them sorta questions ya get me?
Specify more, it's quite vague. Is it decay and the carbon cycle?
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Jellybeanz383
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(Original post by akawais)
Hi

Let's make this a REVISION THREAD for the B1 exam. Let's ask questions and answer other members questions too for our own revision. Post messages/hints/tips to help us succeed in our GCSEs and let's ace this first science exam. :-) If you ask an exam question please include the number of marks the question is worth and give feedback to answers which wouldn't achieve full marks so we do the best we can. This is not a substitute for your own revision.

First question: What is the main reason why we should be careful not to over-use antibiotics?[2]
Over using antibiotics will cause mutations in the genes of bacteria and they can become resistant, as a result the bacteria will become resistant. Developing, new antibiotics takes time and costs money.
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M.B_2000
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https://www.youtube.com/playlist?lis...CC234D0C5278A9
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gwelsh
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(Original post by akawais)
Hi

Let's make this a REVISION THREAD for the B1 exam. Let's ask questions and answer other members questions too for our own revision. Post messages/hints/tips to help us succeed in our GCSEs and let's ace this first science exam. :-) If you ask an exam question please include the number of marks the question is worth and give feedback to answers which wouldn't achieve full marks so we do the best we can. This is not a substitute for your own revision.

First question: What is the main reason why we should be careful not to over-use antibiotics?[2]
So that the bacteria do not mutate or so that they don't become resistant.
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Certified
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Help with process of plant gravitropism and phototropism please?
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Gunjo
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The b1 exam last year was an absolute *****, good luck you guys with biology
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username2219677
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(Original post by Certified)
Help with process of plant gravitropism and phototropism please?
Yo there was a 6 marker on that stuff last year, i think everything about auxin is here:

environmental factors
• light
• (direction of the force of) gravity
• moisture / water

effects on direction of growth
• shoots grow upwards
• shoots grow towards light
• shoots grow against (the force of) gravity• roots grow downwards
• roots grow towards moisture
• roots grow towards (the force of) gravity

hormone
• reference to auxin
• unequal distribution of hormone causes unequalgrowth (rate

also phototropism is the response of light and gravitropism is the response to gravity
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F3rnw3h
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Anyone who wants to revise AQA B1 and test eachother, Kik me at stellarosewzw
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Elleee1234
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im so scared or tomorrow i didnt realise how bad i was at cells
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_Xenon_
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(Original post by Elleee1234)
im so scared or tomorrow i didnt realise how bad i was at cells
for AQA?
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IAmAnTroll
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Is there a Skype revision group? I'll happily help and answer questions
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Elleee1234
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(Original post by _Xenon_)
for AQA?
Yeah
have any idea what would the best topics for me to revise because i dont want to revise something thats worthless to me tomorrow afternoon
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bikiniikilll
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(Original post by IAmAnTroll)
Is there a Skype revision group? I'll happily help and answer questions
Can you please explain the carbon cycle in an easy way??
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IAmAnTroll
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(Original post by bikiniikilll)
Can you please explain the carbon cycle in an easy way??
Carbon cycle -
Firstly, plants photosynthesise and take in carbon dioxide
plants and animals respire and release carbon dioxide into the atmosphere
Carbon is transferred to animals when they eat green plants
When the plants and animals die microorganisms that feed on the dead organisms respire and release carbon dioxide. fossil fuels formed by dead organisms release carbon dioxide when combusted
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