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Which one of the following statements is correct for secondary succession?

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Important Questions on Ecosystem

MEDIUM
Choose the right sequence of hydrarch succession from the following:
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In hydroseric succession, which stage comes just before sedge meadow stage?
MEDIUM

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.

MEDIUM
During ecological succession:
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Secondary succession takes place on / in        
HARD

Assertion (A): A primary succession is more common than secondary succession.

Reason (R): Biogeochemical cycling is absent in secondary succession.

MEDIUM
The primary producers of the deep-sea hydrothermal vent ecosystem are
MEDIUM

Match the following lists:

  List-I   List-II
(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:

EASY
A violent volcanic eruption wiped out most of the life forms in an island. Over different forms of simple organisms colonised this region, followed by the emergence of other organisms such as shrubs, woody plants, invertebrates and mammals. This ecological process is referred to as
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What is pioneer species?
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The organisms which invade a bare area to initiate an ecological succession are known as
MEDIUM
Differentiate between primary succession and secondary succession.
HARD
Choose the incorrect statements.
(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.
MEDIUM
Vertical distribution of different species occupying different levels in a biotic community is known as:
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If 20J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?
plant mice snake peacock
HARD
Study the following graph of the metabolic rate of various terrestrial mammals as a function of their body mass and choose the correct option below.

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EASY
Ecological succession is
MEDIUM
Choose the incorrect statements.
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.
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Secondary succession takes place on/in: