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Physics, Chemistry and Biology: Post your doubts here!

Z

za Shadow

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Abu mota said:
O/N 03 Q.13 doesnt open on xtremepapers
J 04 Q.40 it isnt B because the direction of the flow is away from the garden so the sewage cant come back to the garden
J 06 Q.12 it cant be A because there is a shape of a graph which u have to memorize and also when you increase the temperature from 20 to 30 the rate shud increase but it decreased at A.
nov 08 it shows half of the flower and so shows half the number of stamens, which means it has more than 4 stamens
nov 09 it is D because circulating the blood mains a steep diffusion gradient, thats why our body keeps on pumping blood, every second.
J 11 doesnt open
N 11 glycogen's basic units are glucose not fatty acids, it is clearly C because oil is the same as fats, and fats monomers are fatty acids and glycerol.
ur questions all need studying not explaining :/
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FATIMAH said:
-----> A is not correct b/c if photosynthesis cannot take place b/c it not photosynthesis which keep the plant turgid !!it only provide it with growth and it cannot be C b/c transpiration occurs from both the stem and leaves and so if it was the reason then stem will not be upright
----->B cannot be correct b/c they show the direction of water flow . water from the sewage work is not going back to garden. the water which is flowing near the garden is coming with the factory wasste in it

------> in nov 08 it is written that the diagram shows half flower so see this View attachment 12499


-------> IN NOV 09 , D IS CORRECT B/C IT MEANS THAT IT MAINATINS DIFFUSION GRADIENT. THE BLLOD TAKES AWAY THE OXY BLOOD SO THAT ALWAYS THE BLODD HAS LOW CONC OF O2 THEN THE LUNGS

------>IN JUNE 11 Q 26 THEY ARE ASKING THAT Which line correctly shows the path that was taken by a pollen tube to an ovule? SO IT SHOULD BE FROM THE STIGMA
IN A IT IS FROM THE STALK
IN B IT IS FROM THE FILAMENT
IN C IT IS FROM OUTSIDE THE FLOWER
IN D IT IS FROM THE STIGMA

........> IN 27 A IS NOT CORRECT !! IT DOESNOT PASS FAECES TO MOTHER !! FAECES ARE SOLID (LOL) IT ONLY PASS WASTE MATERIAL LIKE CARBONDIOXIDE.. FAECES ARE A FORM OF EGESTION

........> IN NOV 11 IT IS NOT B B/C FATTY ACIDS ARE THE BASIC UNITS OF FATS NOT GLYCOGEN....GLYCOGEN IS THE COMPLEX FORM OF GLUCOSE

HOPE IT HELPED! IF U DIDNT UNDERSTAND STILL FEEL FREE TO ASK :):)
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THHHHHHHHHAAAAAAAAAAAAAAAAAANNNNNNNNNNNNNNNNNKKKKKKKKKKKKK UUUUUUUUUUUUU BOTTTHHHH SOOOOOOOOOOOOO MUCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH REALLY APPRECIATE UR EFFORT :D
 
NIM

NIM

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AAnsarii said:
anther produces pollen grains, which fall on d stigma (d pointed thing here) n makes its way 2 d egg cell
can't b B coz it doesn't happen internally, cant b C coz where it's falling is not d stigma
hp it helped:)
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thnx dude!!!
 
Z

za Shadow

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Rahma Abdelrahman said:
Why do stomata open?
They open in favourable conditions such as high light intensity and optimum temperature to absorb maximum CO2 for maximum photosynthesis.
How do they open?
When the rate of water uptake by the plant is high, the cells become turgid, right? And so are guard cells but instead of becoming just turgid, they curve allowing stomata to open.
What makes the guard cells curve?
This is because the guard cell has thicker inner walls than the outer walls, causing the unequal pressure on both walls and hence the curvature.

For the xylem Q., I believe xylem should be the darker one, but here we should only know that water leaves through stomata, which leaves no other option but B.

Hope this helps! :)
And, you are most welcome!
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WOOOOOOOOOOOOOOOOOWWWWWW AWESOME U R REALLY A G8 TEACHER :LOL: :D THANKS AGAIN :)
 
T

The sun

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Could someone help me in Biology (0610) NOV.1999 Q37 I think the answer must be B but the answer in de ms is D, So which one is correct?:(
 
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