AQA BIOL2 Biology Unit 2 Exam - 26th May 2011

Reply 2060

ellen-marie1992

For the pesticide one when it said about evaporation from the lake I wrote that if the water is evaporating then the concentration of pesticides will increase as they don't evaporate with the water.
Anyone else wrote this?

I couldn't remember the starch stuff which annoyed me as I knew it was my bad topic.
I wrote its insoluble in water and compact etc but non of that really answered the question did it?

- I wrote exactly that cos water would otherwise dilute it

Reply 2061

TlanTlan

6

Original post by EffKayy

Only same species will recognise the call, then elaborated and talked more about
the female receptive stage and female recnogising male etc.

It wasn't asking about the process of courtship behaviour it was looking at how to identify species that way and their relationship

So it would of been about more closely related species having more similar mating calls etc.

Reply 2062

EffKayy

16

Original post by TlanTlan

It wasn't asking about the process of courtship behaviour it was looking at how to identify species that way and their relationship

So it would of been about more closely related species having more similar mating calls etc.

Courtship BEHAVIOUR DOES identify if the species are similar. jheeze

Reply 2063

swiftylol

18

Original post by TlanTlan

It wasn't asking about the process of courtship behaviour it was looking at how to identify species that way and their relationship

So it would of been about more closely related species having more similar mating calls etc.

Mating calls = courtship behaviour.

Reply 2064

TlanTlan

6

Yeah i linked them together, but i thought the question wasn't asking for a description of the courtship mating behaviour.

Reply 2065

sheepzibaa

4

ums conversion is good for biol papers, on a passed paper i got like 64/85 and using aqa website ums converter it turned out that was like 137/140 ums!!!!

Reply 2066

Insanity514

15

I don't remember the courtship behaviour question :l
What was the exact question and what other questions were asked on the same page?

Reply 2067

Jessica_94

12

has anyone uploaded the paper yet? :smile:

Reply 2068

minisardar12

how did everyone find it? :smile:

Reply 2069

EffKayy

16

Original post by minisardar12

how did everyone find it? :smile:

well look through the 100 or so pages and find out.

Reply 2070

EffKayy

16

Original post by Insanity514

I don't remember the courtship behaviour question :l
What was the exact question and what other questions were asked on the same page?

about investigating relationship in species by the 'call'.

Reply 2071

Jeshiii

Original post by parallal

I put the same thing for the pesticides question.

For the starch I think you had to put it was insoluble so it will not affect water potential of the cell. It won't lower w.p. so excess water will not be taken in by osmosis and the cell will not burst.

Ahh yeh :/
I knew it was insoluble but my brain just shut down on the water potential section.
I'm a div aha, that was really obvious too!

Reply 2072

Messi3

1

Is there an unofficial mark scheme?

Reply 2073

EffKayy

16

Original post by Messi3

Is there an unofficial mark scheme?

no

Reply 2074

F1's Finest

21

Original post by barzy_j

Why do people make it sound so difficult and worry people? All you had to say is that starch is insoluble and so has no osmotic effects (forget this whole water potential business)

yeah thats exactly it !! some people tend to go overboard for the extra marks, when actually they score full marks for saying starch is insoluble and has no osmotic effects.

Reply 2075

EffKayy

16

Original post by James A

yeah thats exactly it !! some people tend to go overboard for the extra marks, when actually they score full marks for saying starch is insoluble and has no osmotic effects.