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Edexcel A2 Biology Unit 4(6BIO4) 13/06/11 - OFFICIAL THREAD !

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Can anyone please explain nerve impulses to me? At the beginning of topic 8 !

thank you - the book gives me a headache and we havent covered it fully in class

Reply 21

Schoolio93

Original post by IGotAQuestion

Can anyone please explain nerve impulses to me? At the beginning of topic 8 !

thank you - the book gives me a headache and we havent covered it fully in class

You need to post this question in the A2 Biology Unit 5 section.

Reply 22

dush_2

Original post by Schoolio93

You need to post this question in the A2 Biology Unit 5 section.

yes u r ture why do u post in unit 4 section ??

dw its sorted :wink:

*Joins this thread* :sigh:

Reply 25

InItToWinItGetIt?

Original post by blush.ox

*Joins this thread* :sigh:

Welcome

Reply 26

medtobe

I'm doing it?
from what book are you all revising?

Reply 27

JP83

I'm doing it - finding this the most boring unit so far - so hard to motivate myself to revise for it, much prefer unit 5! Memorising the CGP book got me an A at AS so hoping the same stategy works for A2!

Reply 28

blush.ox

Original post by JP83

literally what im doing this time round, hope it works :erm:

Reply 29

InItToWinItGetIt?

Has anyone got any notes on the core practicals?

Reply 30

JP83

http://www.thestudentroom.co.uk/showthread.php?t=1182098&highlight=6bio8&page=3

This is a thread for the practical alternative paper (which I am doing) and if u scroll down someone has kindly added links to pdfs for notes on all the core practials which have been a lifesaver for me! They are all from units 4 and 5 so will need to just check which ones are for unit 4

Also the CGP book is good for a summary of the practicals :-)

Reply 31

InItToWinItGetIt?

Original post by JP83

Thanks

Is the CGP book good? I'm thinking of asking my mum to buy it but not too sure on how good it is. :s-smilie:

Reply 32

blush.ox

Original post by InItToWinItGetIt?

Thanks

Is the CGP book good? I'm thinking of asking my mum to buy it but not too sure on how good it is. :s-smilie:

yes

its very good and simplifies bio to a great extent for people like me :ninja:

Reply 33

M Kh

CGP book? which one is it? ru talking about the revision guide???

Reply 34

blush.ox

Original post by M Kh

CGP book? which one is it? ru talking about the revision guide???

CGP rev guide, the green one

Reply 35

M Kh

the green and purple EDEXCEL A2 BIOLOGY REVISION GUIDE for SNAB and concept-led approach or the green EDEXCEL A2 BIOLOGY STUDENT'S BOOK?? and what do u mean by CGP?

Reply 36

JP83

The CGP book is a revision book - it is dark green and simply says A2-level biology edexcel - the revision guide on the front.

It follows the specification to the letter so if you are working your way through the spec in order to make sure you cover everything, the CGP book organises they key points of each spec point clearly in nice boxes and bullet points of the main facts. Its a really well designed book and well worth getting. (the AS one is useful too for a quick recap of AS stuff you may have forgotten too!)

Reply 37

M Kh

hey could some one plz tell me the procedure of this Edexcel A2 Biology core practical --- HOW TO INVESTIGATE THE EFFECT OF TEMPERATURE ON SEEDLING GROWTH RATE? u guyz must be studying in a scool so ur teachers must have taught u this....plz help guyz...

Reply 38

JP83

hi, i'm not studying in school i'm self studying too but the basic outline of the experiment is:

Investigating the effects of temperature on seedling growth rate

•Plant some seedlings in soil trays and measure the height of each seedling

•Put the trays in incubators at different temperatures

•Make sure all other variables are the same (e.g. water content of soil, light intensity, CO2 concentration, seeds from same plant etc) for each tray

•After a period of incubation record the change in height of each seedling. The average growth rate in each tray can be calculated in the following way:

AVERAGE CHANGE IN SEEDLING HEIGHT IN EACH TRAY/INCUBATION PERIOD

Repeat to get average mean for each temperature
Plot a graph etc

Up to a point, the seedling growth should increase as enzyme activity increases hence metabolic rate and growth rate increases

Hope that helps :smile:

Reply 39

medtobe

Can we discuss the core practicals and write notes for all of them??