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11.Organisms and Populations
medium
In the mountains, there is a lot of moisture and water and still the plants are xerophytes, because
A
Water turns into snow on mountains
B
Water runs away due to the presence of slopes and can not be used by plant (physiological dryness)
C
Rocks of mountains cannot absorb water
D
None of them is correct
Solution
(b)Steep slopes cause fast, running of water which result in erosion and do not permit the accumulation of humus so the soil becomes denuded. In such soil plants cannot grow properly and vegetation changes into xerophytic plants. In valleys humus accumulates, so they have luxuriant vegetation and slopes contain xerophytic plants.
Standard 12
Biology
Similar Questions
Match List $- I$ with List $- II.$
| List $- I$ | List $- II$ |
| $(a)$ Allen's Rule | $(i)$ Kangaroo rat |
| $(b)$ Physiological adaptation | $(ii)$ Desert lizard |
| $(c)$ Behavioural adaptation | $(iii)$ Marine fish at depth |
| $(d)$ Biochemical adaptation | $(iv)$ Polar seal |
Choose the correct answer from the options given below.
$(a) -(b)- (c)- (d)$
