Qualification > Sciences
Biology Help Please ??
AS girl:
--- Quote from: Bani on June 05, 2009, 08:46:52 am ---please help:O/N 2007, paper 1, Question No.29
And can u please tell me the reason the answer is not B, because I think since there is light, the plant should bend, as auxin will be destroyed....
--- End quote ---
It has nothing to do with auxins..5 degree celsius is a low temperature..so enzymes are inactive..rate of photosynthesis is low so the plant will grow but not that high!
the answer is B By the way!
Hope u understood my explanation
camel:
--- Quote from: omfg.natalie on June 05, 2009, 09:17:48 am ---
--- Quote from: noemi on June 05, 2009, 09:07:33 am ---
--- Quote from: sanity_master on June 05, 2009, 09:06:13 am ---+ rep for u :)
--- End quote ---
thank you :) could you explain q. 27 june 2005
--- End quote ---
It is D. This is because when Invertabrated move away from a light source, this is negative phototaxis.
When a plant bends towards the light, this is positive phototropism.
Also, remember that when invertabrates respond to chemicals, this is called Chemotaxis
When they respond to gravity, this is geotaxis
--- End quote ---
thnkss
Bani:
--- Quote from: IG girl on June 05, 2009, 09:20:52 am ---
--- Quote from: Bani on June 05, 2009, 08:46:52 am ---please help:O/N 2007, paper 1, Question No.29
And can u please tell me the reason the answer is not B, because I think since there is light, the plant should bend, as auxin will be destroyed....
--- End quote ---
It has nothing to do with auxins..5 degree celsius is a low temperature..so enzymes are inactive..rate of photosynthesis is low so the plant will grow but not that high!
the answer is B By the way!
Hope u understood my explanation
--- End quote ---
Oh I meant why is the asnwer not D....So its because it says the colour of the leaf is yellow, but in B its green.
So, since photosynthesis is happening in B, the colour is green, and thats why the asnwer is B
Ok, thanks, +rep :)
Bani:
--- Quote from: kam on June 05, 2009, 09:19:56 am ---bani
its B cuz leaves are green due to photosynthesis
its short cuz its too cold to grow
enzymes are not at their optimum
--- End quote ---
Oh thanks, + rep :)
Bani:
And can please someone explain me Q31 , O/N 2007, pleaseee. How do we work it out?
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