| I. | Sedimentary nutrient cycle - Nitrogen cycle |
| II. | Pioneer species - Lichen |
| III. | Secondary succession - Burned forest |
| IV. | Pyramid of biomass in sea -Upright |
A) I, II and IV
B) I and III
C) II and III
D) II and IV
Correct Answer: C
Solution :
Secondary succession is a biotic succession that occurs in an area which become secondary bared due to the destruction of the previous community or secondary bared area can occur due to the forest fix, submergance by major flood, recently cleared are left to itself harvested crop field left uncultivated for several years, etc. The species which involve a bare area are called pioner species. There are usually crustose lichens which are able to secrete acids to dissolve rock, help in oveathering and soil formation.
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