A level Biology: Post your doubts here!

[ABC12348]

i hope gt is low.

 

[ABC12348]

Also,what was the answer for 'germinating seed from botanic garden every few years? i wrote in order to keep the seed germinating and or protect it from drying and thus protecting the endangered specie etc.

 

[Saad Amjad.]

C will be acetylcholine.

 

[ABC12348]

acetylcholine? how?

 

[Saad Amjad.]

ooops sry its acetylcoenzyme A..check photosynthesis chapter in the coursebook...i wrote acetylcholine

 

[ABC12348]

chalo, koi nae. btw what did you write about that 'seed germination every few years'?

 

[Wolfgangs]

"I have a question related to my grades. In AS Levels May/June 2014 session, I scored "a" in Mathematics and Physics, while I scored "c" in Biology (I know that my overall grade is bad). Is it still possible to score an overall A in Biology? By what percent is it possible? What about A*?"

I don't really know my exact percentage, but is it still possible to score A at least? I know some people who had d in AS, but where able to score B. So, opinions?

 

[Saad Amjad.]

depends..i also had a C in bio..but straight A's in my other 3 subs..i did not take a risk and repeated my AS together with my A2

 

[npatil]

did anyone sit paper 23?

 

[emilyy]

how do we calculate degrees of freedom, any formula for that?

 

[ABC12348]

total out comes -1. for example in the case of a coin there are 2 outcomes, either heads or tails. so you subtract 1 from 2. The answer is (2-1) = 1. So, 1 is your degree of freedom.

 

[Bba321]

Please help me with question 36
Thanks

http://papers.xtremepapers.com/CIE/...and AS Level/Biology (9700)/9700_s09_qp_1.pdf

 

[RoOkaYya G]

Please help me with question 36
Thanks

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s09_qp_1.pdf

B
the antibodies would get used up so it needs to be administered constantly at regular timings.

 

[Wolfgangs]

So guys? Can anyone give me an advice about my Biology? Can I change it from "c" to "A" if I worked hard? Or is it better to repeat my AS?

 

[RoOkaYya G]

So guys? Can anyone give me an advice about my Biology? Can I change it from "c" to "A" if I worked hard? Or is it better to repeat my AS?

anythn is possible if u work hard.

 

[Bba321]

B
the antibodies would get used up so it needs to be administered constantly at regular timings.

Why not C?

 

[manutd96]

http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_s13_qp_11.pdf

Q27, can someone explain to me what is wrong with options ACD? exam tomorrow please help thanks!

 

[ABC12348]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s13_qp_11.pdf

Q27, can someone explain to me what is wrong with options ACD? exam tomorrow please help thanks!

A is not possible. because 'high humidity' ( factor against transpiration)
D is not possible. because apoplast pathway is completely barred. ony symplast is possible.
C. about this i'm not sure but it states 'from the saturated air space' and as far as my knowledge is concerned saturated refers to the fact when there is no air space and all of it is occupied with water. so with no airspace no diffusion can take place.

 

[Bba321]

Pleaseee explain me qs 5 .I have my p1 tomorrow
Thanks


http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w12_qp_11.pdf

 

[ABC12348]

limit of resolution is about one half of the radiation that is being used to view the specimen. In other words, if object ( that is being viewed) is any smaller than half the wavelength that is being used to view it, it can no be seen separately.

Pleaseee explain me qs 5 .I have my p1 tomorrow
Thanks


http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w12_qp_11.pdf