Qualification > Sciences

CHEM AND BIO HELP AND TIPS HERE

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nid404:
hope uve liked it archangel

archangel:
AHH THANK YOU SOO MUCH  ;D
 + rep for you =)

2009scared:

--- Quote from: nid404 on May 17, 2009, 05:41:48 am ---Guys,
        These r my subjects. So if u have any doubts or want to share some tips, pls go ahead. I'll try to answer all ur questions asap........others can join in to help(of course).
There's no common thread for these subjects and so I thought of having one. It'll be easier.



--- End quote ---

cn u please gimme d answers 4 nov 01...q3 n q1 please
i m confused

nid404:
I suppose this is paper 6

well, for q1

a)i) potato A will be turgid whereas B will be bent downwards.
ii) Explain the effect of the solution it is placed in
B is in a conc solution so water potential in potato strip is higher than the solution. This causes water to move out of the strip, down the concentration gradient. This results in loss of mass of the strip and the mass hanging from it causes the strip to bend.
iii) Draw a plant cell .The cell cytoplasm should be shown as pulled away from the membrane.  check the image
b)RBCs r animal cells and so do not have a cell wall. Cell walls prevent the cell from bursting. When placed in water, water travels into the cell and since there's no cell wall the cells burst.

I haven't done the graph for q3 but I can help u with the rest of it.
b)ii) For this question explain the process of transpiration(loss of water from leaves leading to a loss of mass)
iii) There can be other methods too but I think this is the most [preferred method
-Apply vaseline on the lower surface of the leaf.hang the leaf.
-Keep a cobalt chloride paper close to the upper surface of the leaf.
-the cobalt chloride paper turns pink in presence of water. This shows there is loss of water from the upper surface which results in loss of mass.

I hope this is fine

magician007:
Thanks for your help on the kidney, especially the animated diagram - that was so helpful!!!

Thank a lot!

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