Question

Any one knows the explanation for this question?

Answer 1

The answer is A I have no idea why =_=

Answer 2

You need to think in terms of expansion of the thick-walled outer cells and the thin- walled inner cells.

Answer 3

First tell me, will water move in or move out when the stalk is placed in a sucrose solution of high water potential?

Answer 4

i think water comes into

Answer 5

*into

Answer 6

Yes, right. Now see, the thinner-walled cells will expand more, while the thick-walled outer cells will expand very slightly due to the pressure exerted by the thick cell wall. Get it?

Answer 7

But how do we tell the difference between A or D

Answer 8

Due to the difference in expansion, the stalk curves outwards, meaning the thick-walled cells will be on the (inner,shorter) side while the thin-walled cells will be on the (outer,longer) side.
That's how you tell the difference between A and D.

Answer 9

Ok Lastly (so sorry)
@emcrazy14 what are they trying to imply by drawing the dark line?
I don't even know what the dark line means :O

Answer 10

See the original stalk? The dark coloured lines represent the outer thick-walled cells. So the dark coloured line in the options also represents the thick-walled outer cells (which expand less when water moves in)

Answer 11

@emcrazy14 thnk u!!

Answer 12

Ok now I get
but you guys have to admit this is by far one of the most ridiculous question
Cambridge ppl have come up with =_=

Answer 13

Hahahaha, there have been more ridiculous questions asked. xP I still didn't start preparing for the MCQs exams yet.\

Answer 14

@emcrazy14 im so sad T_T me and KL-RC are preparing for our exam over skype, we did mcq test of one of the latest years and i made a lot of mistakes :(

Answer 15

Oh-oh. Don't worry, @Somy . The key to getting good marks in MCQs is practising alot of questions. Think with a clear head and you'll get them right. x)

Answer 16

hmm i'll try!! i'll do my best!!!

Answer 17

Good Luck. Do as many questions as you can. A lot of them get repeated every year.

Answer 18

thnk you :* @emcrazy14

Answer 19

good luck to u too!!!! lest get best marks all of us!!!!! :D

Answer 20

Thank you. ^_^ YESSS! Lezz do it! :D