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Biology MCQ thread..!!

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MHHaider707 said:
Hey can anyone please help me in O/N 04 P1 Q.38

Here's the link:

http://www.xtremepapers.me/CIE/Internat ... 4_qp_1.pdf


And in O/N 05 Q.27

http://www.xtremepapers.me/CIE/Internat ... 5_qp_1.pdf

Q38.
the ans is D because plants respire in order for photosynthesis to occur
photosynthesis helps them grow
and and the chemical reactions of photosynthesis are the 'other life processes'

Q27.
ans is D
low atmospheric humidity leads to a great difference in the water potential of plants and atmosphere
low soil water potential, means very little water in the soil
wind speed high creates a low atmospheric humidity ( this one works just like the evaporation of water )
 
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But em confused about that Q.27 of O/N 05 coz in Q it says that 'in which combination of conditions the stomata are most likely to close'
so according to that wind speed should be low and atm. humidity should be high........right???
 
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MHHaider707 said:
sweetiepie said:
becox of steepnees of concentration gradient ....:)


But i din get it!!

Stomata close when the rate of transpiration is too much. (and the supply of water is low)

you just have to find a set among those which satisfy the requirement
 
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Yeah the answer C is rite coz malaria cannot pass directly from mother to child!!!!

sweetiepie said:
B....ANSWER...:)


It says least likely!!!
HIV is most likely!!
 
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histephenson007 said:
MHHaider707 said:
sweetiepie said:
becox of steepnees of concentration gradient ....:)


But i din get it!!

Stomata close when the rate of transpiration is too much. (and the supply of water is low)

you just have to find a set among those which satisfy the requirement


Thanx histephenson007!!!! :) :) :)
 
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