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AQA - BIOL4 - 13th JUNE 2014

Reply 580

Henn

Thinking of doing the 6 marker questions first in the exam
Is anyone else going to do that?

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Reply 581

Magenta96

OP

16

Original post by walkers38

Stabilising selection
It occurs in unchanging environment. In this selection, value around the mean is best adapted. And the extremes are selected against. Mean is unaltered, range is reduced. This is repeated over many generations. Eventually increasing proportion of population become well adapted to the environment.

Directional selection
Mutation causes variation within members of population. So, there is selection for one extreme. Only that better adapted extreme will survive and reproduce and pass on alleles to their offspring. This leads to mean value shifting to left or right depending on which extreme has been selected for.

Thank you

Reply 582

Magenta96

OP

16

Original post by Henn

Thinking of doing the 6 marker questions first in the exam
Is anyone else going to do that?

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yeah me too, my teacher always told us since we started AS to always do the longer questions at the end first.

Reply 583

Magenta96

OP

16

Original post by chemistrykid123

How is everyone revising from past papers are doing them then learning the mark scheme or leaving out some questions etc?

I've just been going through all the AQA papers and doing all the questions, I tend to leave out some parts of question 7 that I don't think will be helpful, things like why newts eat the toads or whatever because that's not really going to be relevant.

Reply 584

Henn

Original post by Magenta96

yeah me too, my teacher always told us since we started AS to always do the longer questions at the end first.

Yeah, that way I won't be stressed that I won't have enough time for the questions at the back which are easy marks, better to have them in the bag first!
What about the essay in bio5?

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Reply 585

Magenta96

OP

16

Original post by Henn

Yeah, that way I won't be stressed that I won't have enough time for the questions at the back which are easy marks, better to have them in the bag first!
What about the essay in bio5?

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I always struggle with time also because I like to read every little thing in detail, and double check which makes me run out of time! I think it might be better to do the synoptic essay last, again, my teacher goes that have a look at the titles for the essay first, THEN go do the question paper and while you're doing it loads of ideas should come into your head and just keep writing them all down in the plan, then do the essay at the end. :smile:

Reply 586

rwilliams5

1

Original post by Henn

Yeah, that way I won't be stressed that I won't have enough time for the questions at the back which are easy marks, better to have them in the bag first!
What about the essay in bio5?

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I'll read the essay questions first then do some of the questions so I'm thinking biology before deciding which one I'll do. I'll gradually add to the plan whilst I'm doing the paper. I'm not normally pushed for time (not being arrogant I just work quickly) so fingers crossed the essay is nice and I can get a lot down.

Reply 587

pandabun

1

Original post by Henn

Thinking of doing the 6 marker questions first in the exam
Is anyone else going to do that?

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Yes, my exact plan!

Reply 588

Henn

I have to read the question like 3 times to come up with decent answers :frown:

but thanks ! I shall do that

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Reply 589

Magenta96

OP

16

Original post by jacksw

oooh him/her! I used those notes for a previous unit, totally forgot about this.

Thank you. :smile:

Hi! I was just looking at the scienceisgood thread again, and I remember you felt the worksheets on there were not really that relevant to our specification, have you tried the old spec papers on there? They're actually pretty similar to our specification and they're really useful too so just thought I'd let you know. :smile:

Here's the link again:
http://www.thestudentroom.co.uk/showthread.php?t=2176162

(edited 9 years ago)

Reply 590

jacksw

Original post by Magenta96

Hi! I was just looking at the scienceisgood thread again, and I remember you felt the worksheets on there were not really that relevant to our specification, have you tried the old spec papers on there? They're actually pretty similar to our specification and they're really useful too so just thought I'd let you know. :smile:

Here's the link again:
http://www.thestudentroom.co.uk/showthread.php?t=2176162

Thanks. It's kind of ironic looking at papers from 2007, because if I had chosen to do Biology when I was at college, these would have been the papers I would have done! Deff going to have a look through them :smile:

I feel so old!

Reply 591

The_Blade

6

Original post by Magenta96

Hi! I was just looking at the scienceisgood thread again, and I remember you felt the worksheets on there were not really that relevant to our specification, have you tried the old spec papers on there? They're actually pretty similar to our specification and they're really useful too so just thought I'd let you know. :smile:

Here's the link again:
http://www.thestudentroom.co.uk/showthread.php?t=2176162

ive done 2 legacy papers so far

Reply 592

jacksw

Original post by The_Blade

ive done 2 legacy papers so far

Legacy papers?

Reply 593

The_Blade

6

Original post by jacksw

Legacy papers?

2006-2009

Reply 594

Rhubarb96

Anyone please please explain june 11 q5 unot 4 so confused by it. Thanks! !

Reply 595

Magenta96

OP

16

Original post by The_Blade

ive done 2 legacy papers so far

So are the legacy papers like these papers? I think these ones are a bit different to those on the AQA site for 2009 and below.

(edited 9 years ago)

Reply 596

marlon1995

Original post by Magenta96

So are the legacy papers like these papers? I think these ones are a bit different to those on the AQA site for 2009 and below.

The blade is a friend, he has trouble in social situations and choses awkward words. Last specification is what he means

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Reply 597

saraw26

11

As of 11 this morning I completed all of my A Levels apart from Biology, so some cramming for Bio is needed now :tongue:

Reply 598

safffy

Original post by Magenta96

How do you show that a gene is not on the x chromosome?

Hey you always have to give evidence for the gene not being on the X chromosome in pedigree charts I always remember the phrase "like father like daughter" if it is sex linked the daughter will have the condition and the father will have the condition . If it isn't sex linked then the father may have the condition but the daughter(s) may not. This is because the the father can only give on X chromosome to his daughter and if the allele for the condition is on the X chromosome then he will pass it on! Hope that helps

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Reply 599

KingersZD

9

Does anyone have an idea what the mini essays at the back are going to be about? Hope it's on ecology or something

AQA - BIOL4 - 13th JUNE 2014

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