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Pick out the correct option from (a) to (e).
A. Primary succession begins in areas where natural communities have been destroyed.
B. Hydrarch succession takes place in water.
C. The climax community is the community that is in near equilibrium with the immediate environment.
D. In newly cooled lava secondary succession occurs.

A

A and B are correct C and D are incorrect

B

A and D are correct, B and C are incorrect

C

B only is correct, A, C and D are incorrect

D

B and C are correct, A and D are incorrect

Text Solution

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The correct Answer is:
D
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Read the following statements and state how many of them are true ? (P) primary succession , is a very slow process taking thousands of years for the climax to be reached . (Q) All succession whether taking place in water or land proceeds ti a similar climax community, the mesic. (R) As succession proceeds, the number and types of animals and decomposers also change. (S) Saprophytes are not given any place in the ecological pyramids as they play no role in the ecosystem.

Assertion: Primary succession occurs over a primarlly bare area where there was no living matter from the very beginning Reason: During primary succession, reproductive structures of the previous occupants give rise to a new seral community as soon as the conditions become favourable.

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GRB PUBLICATION-ECOSYSTEM -EXEMPLAR PROBLEMS
  1. Pick out the correct option from (a) to (e). A. Primary succession ...

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  2. Decomposers like fungi and bacteria are: i. autotrophs ii. heter...

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  3. The process of mineralisation by microorganisms helps in the relase of

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  4. Productivity is the rate of production of biomass expressed in terms o...

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  5. An inverted pyramid of biomass can be found in which ecosystem?

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  6. Which of the following is not a producer?

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  7. Which of the following ecosystems is most productive in terms of net p...

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  8. Pyramid of numbers is

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  9. Approximately how much of the solar energy that falls on the leaves of...

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  10. Among the following where do you think the process of decomposition wo...

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  11. How much of the net primary productivity of a terrestrial ecosystem is...

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  12. During the process of ecological succession, the changes that take pla...

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  13. Climax community is in a state of

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  14. Among the following biogeochemical cycles, which one does not have los...

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  15. The sequence of communities of primary succession in water is

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  16. The reservoir for the gaseous type of bio-geo chemical cycle exists in...

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  17. If the carbon atoms fixed by producers already have passed through thr...

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  18. Which of the following type of ecosystem is expected in an area where ...

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  19. The zone at the edge of a lake or ocean which is alternatively exposed...

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  20. Edaphic factor refers to

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  21. Which of the following is an ecosystem service provided by a natural e...

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