AQA - BIOL4 - 13th JUNE 2014

What is the final product of nitrogen fixation carried out by mutualistic nitrogen-fixing bacteria??

Can anyone please describe the carbon cycle? Find it so difficult to understand

You guys are over analysing this exam man just chill out if you don't know it now you won't know it in the exam. Trying to prepare and guess the 5 markers isn't healthy and your putting that info in your head, what even if they don't come up. Just chill and apply you knowledge of biol4 to the exam, that's what they want you to do

What is the final product of nitrogen fixation carried out by mutualistic nitrogen-fixing bacteria??

This has been asked too many times here.
- Sapribionts hydrolyse organic matter into small, soluble molecules by secreting enzymes onto them
- They absorb the products by diffusion
- They then respire which releases CO2 into atmosphere
- CO2 taken into leaves of plants through stomata
- During photosynthesis

Hey does anyone have any tips for those questions on alleles inheritance where you need to give evidence to show its recessive or dominant or sex linked. I just keeping messing them up every past paper I do

Thanks

I know sorry:/ and are you sure is that it what about the whole combustion and decomposition thing?

aaaaaah I really need help on this

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Hey does anyone have any tips for those questions on alleles inheritance where you need to give evidence to show its recessive or dominant or sex linked. I just keeping messing them up every past paper I do

Thanks

They've given you frequency of alleles so 0.33 is your p value.
Q= 1-0.33
P= 0.33
2PQ = 2x 0.33 x 0.67 = 0.4422
this is 42%

Mowing on the roundabout is such a weird question.

I agree! I don't this exam is that deep! along as you know theory and can apply key words and common sense to your answers you'll be ok, I've never seen tsr so freaked out D: it will be ok guys, jist stay calm!

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