AQA BIOL2~3rd June 2013~AS Biology (Now Closed)

Original post by Magenta96

ugh I know, it's a good thing they're quite generous with the grade boundaries though

exactly. like out of ALL the things they could ask us, its has to be about shrimp eyes....... wtf.........

anyway, does anybody know what it means to 'carry out reciprocal crosses'? It's to do with breeding apparently. Thanks!

Reply 883

Swords N Thorns

10

Original post by Layontheland

Well the answer is 8.
If you look at the diagram

You can see 3 sets of identical chromosomes. Due to there being three different chromosomes you can identify how many different combinations you can form. 2^3 = 8 different combinations of paternal and maternal chromosomes.

Where exactly does the 2^3 some from?

Reply 884

FLYINGSPANIARD

Does anyone know the answer to this question in Jan 2012 question 3b???? ( http://filestore.aqa.org.uk/subjects/AQA-BIOL2-QP-JAN12.PDF )
Its the question about 'how many different genera are shown in this diagram'? How would you work it out? Cheers

Reply 885

Futuristicmedic

1

Original post by FLYINGSPANIARD

Does anyone know the answer to this question in Jan 2012 question 3b???? ( http://filestore.aqa.org.uk/subjects/AQA-BIOL2-QP-JAN12.PDF )
Its the question about 'how many different genera are shown in this diagram'? How would you work it out? Cheers

Genera is the first name - as in Felix tiger , Felix would be the genera , so you just count the no of first names in the diagram

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Reply 886

FLYINGSPANIARD

Cheers! Iv been wondering about that one for ages!

Reply 887

I know roughly everything for this, just need to go through everything again quickly over tonight, then will start papers from tomorrow morning :biggrin:

anyone else doing chem2 aswell?

Reply 888

homefind

Original post by PoorLoser

I know roughly everything for this, just need to go through everything again quickly over tonight, then will start papers from tomorrow morning :biggrin:

anyone else doing chem2 aswell?

same here

I do chem2 :smile:

Reply 889

Original post by homefind

same here

I do chem2 :smile:

how are you feeling for chem2?
I think I'm slightly more prepared for chem2 than biol2, or come to mention it, psychology unit 2.

Completely unprepared for psychology :frown:

Reply 890

chelley2

Original post by lettucesoap

has anybody done the January 2011 paper?
this **** is hard

I have.its horrible isn't it :frown:

Reply 891

chelley2

Original post by PoorLoser

how are you feeling for chem2?
I think I'm slightly more prepared for chem2 than biol2, or come to mention it, psychology unit 2.

Completely unprepared for psychology :frown:

I'm more prepared Chem 2 then psychology unit 2 then biol2.Biol2 is just not going in.im getting the most obvious things wrong :frown:

Reply 892

Original post by chelley2

I'm more prepared Chem 2 then psychology unit 2 then biol2.Biol2 is just not going in.im getting the most obvious things wrong :frown:

Hopefully, I should be OK with CHEM2. But those damn equations just aren't going in! :frown:

(metal extractions and the hundred other formulas i have to memorise :/)

With BIOL2, I've downloaded the notes from here: http://www.thestudentroom.co.uk/showthread.php?t=2212505

I'm planning to just keep reading them :P

and for psychology unit 2, I just found some notes I made for stress and social influence. I'm making some revision card thingys for abnormality and then I'll start memorising that over tonight :biggrin:

first, I need to fix my printer to print these biol2 notes :/

Reply 893

chelley2

Original post by PoorLoser

Hopefully, I should be OK with CHEM2. But those damn equations just aren't going in! :frown:

(metal extractions and the hundred other formulas i have to memorise :/)

With BIOL2, I've downloaded the notes from here: http://www.thestudentroom.co.uk/showthread.php?t=2212505

I'm planning to just keep reading them :P

and for psychology unit 2, I just found some notes I made for stress and social influence. I'm making some revision card thingys for abnormality and then I'll start memorising that over tonight :biggrin:

first, I need to fix my printer to print these biol2 notes :/

Same here .equations for metal extraction are starting to annoy living shatt out of me.theres just tooo many.
I just need a bit more practise in biol2 hopefully I'll be ok :smile:

Reply 894

Tee Logan x

1

Original post by PoorLoser

I know roughly everything for this, just need to go through everything again quickly over tonight, then will start papers from tomorrow morning :biggrin:

anyone else doing chem2 aswell?

Oh wow you're extremely prepared :smile:

i'm still making notes lol i'm doing chem2 as well, how you feeling about it? btw did you sit bio1 last week?

Reply 895