I think I have the answer for question 9, but I\'m not 100% its correct. And I h

Question

I think I have the answer for question 9, but I'm not 100% its correct. And I have not a clue for the last question. Any help would be appreciated.

QUESTION 9 Plants typical of the tundra are very short in stature or height. What is advantageous about this so called 'cushion plant form found in the tundra, relative to a tall plant? O a. wind speeds are lower closer to the ground, reducing convective heat loss from plants Ob daytime air temperatures are usually higher closer to the ground, leading to higher convective heat gain by leaves . daytime conductive heat gain from adjacent ground surface would be greater o d. all the above e.b and c

Explanation / Answer

1. Cushion plant is not a plant basically but a group of plant that grows compactly and have short height, which gives them a cushion kind of appearance when looked from above. In my opinion, the answer should be D. all of the above. As, this adaptation of growing together provides an added advatage of wind resistance to these plants and also helps them retain heat efficiently.

2. In my opinion, option A. i.e. saturation vapor pressure of air minus actual vapour pressure of the surface of the object will give better estimate of He because talking about water loss from a surface via stomata or pore and not considering the actual vapor pressure of that surface may give false results. Water moves to regions of low water conc. and hence considering the vapor pressure of the surface and air are both important.

Hope this helps :)

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