EASY
Earn 100

Which one of the following statements is correct for secondary succession?
(a)It begins on a bare rock
(b)It occurs on a deforested site
(c)It follows primary succession
(d)It is similar to primary succession except that it has a relatively fast pace

50% studentsanswered this correctly
Important Questions on Ecosystem
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Match the following?
Column I | Column II | ||
(a) | Predictable change in species composition | (i) | Equilibrium |
(b) | Climax community | (ii) | Seral stages |
(c) | Entire sequence community | (iii) | Ecological succession |
(d) | Transitional community | (iv) | Sere |
(v) | Succession |

MEDIUM
Give reasons for the following:
Climax stage is achieved quickly in secondary succession as compared to primary succession.



HARD
Assertion (): A primary succession is more common than secondary succession.
Reason (): Biogeochemical cycling is absent in secondary succession.

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Match the following lists:
List- | List- | ||
(A) | Rooted hydrophyte with floating leaves | (I) | Limnophila |
(B) | Submerged suspended hydrophyte | (II) | Vallisneria |
(C) | Free floating hydrophyte | (III) | Utricularia |
(D) | Amphibious plant | (IV) | Victoria regia |
(V) | Salvinia |
The correct match is:

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(A) In mesophytes, unless the habitat is specialised no adaption is necessary.
(B) 'Warming' a British botanist classified plant communities as three ecological groups based on the dependence on water.
(C) Due to the flooding, in the destroyed lands the secondary succession occurs much faster.
(D) In hydrophytes, the multi-layered epidermis will be useful in absorbing only water from surroundings.

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EASY
plant mice snake peacock

HARD



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A) Pollinators play significant role in the production of food crops.
B) One of the threats to pollinators is habitat destruction by land use.
C) The climax community remain stable as long as environment is changing with adoptions.
D) Secondary succession will be a slow process compared to the primary succession.


