AQA Biology AS Level Unit 2 thread

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I have done countless past paper questions and the majority (there are some that dont) that require knowledge of the stages ie anaphase 2 or metaphase 2 etc

is this for aqa? because then they are talking about mitosis not meiosis

Reply 381

edward090

Original post by Azula

is this for aqa? because then they are talking about mitosis not meiosis

http://sciencemathsmaster.weebly.com/pack.html
yh they are every PP question from 2009. mitosis doesnt have a second stage?

Reply 382

Azula

Original post by edward090

http://sciencemathsmaster.weebly.com/pack.html
yh they are every PP question from 2009. mitosis doesnt have a second stage?

that isnt aqa

Reply 383

ahsan_ijaz

can somebody outline the ethical issues related to animals in genetic diversity??

Reply 384

thenextchemist

Original post by Azula

that isnt aqa

It is
But it's prior 2009
It's still relevant tho

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Reply 385

ahsan_ijaz

Also , if anyone can explain to me how transpiration effects ? the transpiration rate??

Reply 386

Azula

Original post by Bloom77

It is
But it's prior 2009
It's still relevant tho

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have you seen any question about meiosis relating to any of the stages he has described in any recent paper, because i havent and the cgp guide and aqa endorsed textbook does not mention any of those stages for meiosis either so i'm just going with what i see :wink:

Reply 387

jmensah_

http://filestore.aqa.org.uk/subjects/AQA-BIOL2-W-QP-JUN11.PDF can someone explain q8 part c(i)

Reply 388

Azula

Original post by jmensah_

http://filestore.aqa.org.uk/subjects/AQA-BIOL2-W-QP-JUN11.PDF can someone explain q8 part c(i)

small eggs have large sa:vol ratio so more pesticide moves by diffusion into the eggs and harms them and the egg wall is permeable

Reply 389

jmensah_

Original post by Azula

small eggs have large sa:vol ratio so more pesticide moves by diffusion into the eggs and harms them and the egg wall is permeable

Why is it diffusion an not osmosis as wouldn't more pesticide reduce water potential

Reply 390

Ozez1117

what 6 markers could come up

Reply 391

anonymator

Describe and explain how xerophytic plants are adapted to there function? [6 marks]

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Reply 392

edward090

Original post by Azula

that isnt aqa

what is it then.....

Reply 393

Azula

Original post by anonymator

Describe and explain how xerophytic plants are adapted to there function? [6 marks]

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stomato sunk in pits to trap water vapour, reducing evaporation (and transpiration) by lowering the concentration gradient
curled leaves with stomata inside to protect from wind and so reduce water loss
a layer of hairs on epidermis to trap water vapour round the stomato and reduce diffusion gradient
reduced no of stomata so fewer places for transpiration to occur and for water to escape
waxy, waterproof cuticle on leaves and stem to reduce transpiration of water (and evaporation)

Reply 394

Abcxyz_

Figured it out!!! Sorry 😂

(edited 8 years ago)

Reply 395

OnPoint123

How did everyone find the exam?

Reply 396

Tplox

Bullsht paper
GG WP

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Reply 397

zigzag198

what the actual hell was Q8 and 9 on about though

Reply 398

ranimayx

How did everyone find it?

Reply 399

awesomewarsome

Hated it, what kind of paper was that??????! There was literally no questions on the actual topics in the book it was all just on graphs and data like wth

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