AS Biology P1 MCQs Preparation Thread

[geek101]

Any idea how to solve McQ 39 of oct nov 2011 variant 12

energy fixed (used) / total energy input x 100 = 5000/1000 000 x 100 = 0.5 %

 

[Capricedcapri]

energy fixed (used) / total energy input x 100 = 5000/1000 000 x 100 = 0.5 %

O em such a bosh!! Anyways thanks for the help dude....

 

[Soldier313]

helppppp

 

[The King XII]

Any idea how to solve McQ 39 of oct nov 2011 variant 12

GP= NP-R, GP=Gross which is energy produced by plant and NP= energy transferred to primary consumers R= respiration, so 10000 is produced by plant okay which is gross, gross literally means energy converted to chemical energy from light so (1000000-9900000) is 10000 which is light energy absorbed so follow the equation 10000-(all energy lost by respiration) which is 10000-(5000)= 5000 so they are asking percentage of light coverted to net productivity so N.P= 5000 correct so 5000/1000000= 5x10-3 x100 = 0.5% answer is B correct me if im wrong.

 

[The King XII]

helpppppView attachment 12884

helpppppView attachment 12884

answer is C.

 

[The King XII]

answer is C.

I just wanna make sure before i explain.

 

[Capricedcapri]

helpppppView attachment 12884

It's C ......reason.....xylem is always on The top of phloem....that leaves two options behind A and C .......then u'l luk for the vascular bundles that is always above......so C is the answer....

 

[geek101]

helpppppView attachment 12884

remember in the stem the xylem is inside and the phloem outside
in the root, the xylem is inside (star shaped) and phloem outside
in the leaf the xylem is on the top and phloem on the bottom

in this question, firstly the palisade is the upper layer is fatter in C and D, so throw away A and B...
then xylem is on the top and phloem on the bottom so C

 

[The King XII]

helpppppView attachment 12884

Palisde mesophyl layer is always on top too okay its obviuosly thicker so yeah the answer is C and xylem is always on top K.

 

[yuuki]

need help_mcq 1 oct/nov paper 2010 varaint 1

 

[Capricedcapri]

GP= NP-R, GP=Gross which is energy produced by plant and NP= energy transferred to primary consumers R= respiration, so 10000 is produced by plant okay which is gross, gross literally means energy converted to chemical energy from light so (1000000-9900000) is 10000 which is light energy absorbed so follow the equation 10000-(all energy lost by respiration) which is 10000-(5000)= 5000 so they are asking percentage of light coverted to net productivity so N.P= 5000 correct so 5000/1000000= 5x10-3 x100 = 0.5% answer is B correct me if im wrong.

Awesum!!....thanks man

 

[Soldier313]

I just wanna make sure before i explain.

yep its C

 

[Soldier313]

geek101 The King XII and Capricedcapri
thanx a lot

 

[Capricedcapri]

geek101 The King XII and Capricedcapri
thanx a lot

Same goes for u....np.....: D

 

[yuuki]

In question 1, you mean??
None of the listed organelles are visible under a light microscope with a magnification of x400, except for chloroplasts.

but why isnt mitochondria visible,shouldnt it be visible too

 

[Soldier313]

but why isnt mitochondria visible,shouldnt it be visible too

nope mitochondria aren't visible, when you view a plant cell through a microscope in xul, u cnt c it

 

[yuuki]

nope mitochondria aren't visible, when you view a plant cell through a microscope in xul, u cnt c it

ok thank you so much

 

[Soldier313]

ok thank you so much

welcome

 

[jrahmed]

Pressure potential always has a positive value. So X is for pressure potential.
Solute potential always has a negative value. That's shown by curve Z.
Y is left. That has to be for water potential.

isnt the ans A??

 

[Soldier313]

isnt the ans A??

its D