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Environment QuestionsPage 8

71.

What is complex of vegetation called when it undergoes no further change unless the climate change perceptibly?
(a)An ecosystem
(b)Climatic climax community
(c)End of succession
(d)Edaphic climax community
Comment
Answer is: B

72.

In a chain of communities in a succession each community is a
(a)Link
(b)Step
(c)Sere
(d)Climax
Comment
Answer is: C

73.

The first community to establish itself in an area having no vegetation is formed by the
(a)pioneers
(b)xerosere
(c)beginners
(d)climatic climax
Comment
Answer is: A

74.

A succession taking place in an area where there had been no vegetation earlier is called a ............ succession.
(a)pioneers
(b)primary
(c)secondary
(d)fresh
Comment
Answer is: B

75.

Sometimes the succession starts in areas where the physical conditions required for plant growth are already present. such a succession is called?
(a)pioneers
(b)primary
(c)climax
(d)allogenic
Comment
Answer is: D

76.

The succession may begin in an area where some natural disaster has caused removal of existing vegetation. such a succession is called?
(a)primary
(b)secondary
(c)allogenic
(d)autogenic
Comment
Answer is: C

77.

A succession starting in a lake or river etc is called .......... succession.
(a)Xeric
(b)Hydric
(c)A Primary
(d)A Secondary
Comment
Answer is: B

78.

A xeric succession occurs in
(a)a desert region
(b)a mountains region
(c)a humid region
(d)a very cold region
Comment
Answer is: A

79.

The functioning of an ecosystem involves
(a)flow of energy and circulation of nutrients
(b)an increasing simplicity of relations
(c)increasing animal populations
(d)increasing number of trees and bushes etc
Comment
Answer is: A

80.

The Ecological pyramid that is always upright
(a)pyramid of energy
(b)pyramid of biomass
(c)pyramid of number
(d)None of these
Comment
Answer is: A

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