CSS :: Population Biotic Community

@ : Home > Forestry > Population Biotic Community

31.

According to polyclimax hypothesis, the climax stage is controlled by:

A.	Edaphic factors	B.	Biotic factors
C.	Topographic factors	D.	All of these

32.

The ecological succession occurring as population 1 ? 2 ? 3 ? 4 indicates

A.	Cyclic succession	B.	Induced succession
C.	Retrogressive succession	D.	Allogenic succession

33.

In a hydrosere the plants like Carex, Cyperus, and Juncus appear just after a community comprising:

A.	Lemna, Wolffia, Spirodela	B.	Nuphar, Nelumbo, Victoria
C.	Scirpus, Typha, Sagittaria	D.	Najas, Ceratophyllum, Elodea

34.

Mark the correct sequence of events occurring during ecological succession:

A.	Nudation ? ecesis ? aggregation ? migration	B.	Migartion ? ecesis ? aggregation ? nudation
C.	Nudation ? migration ? ecesis ? aggregation	D.	Nudation ? ecesis ? migration ? aggregation

35.

The direction of succession is:

A.	Predictable	B.	Unpredictable
C.	Hephazard	D.	Always changing

36.

Mark the climatic cause for the initiation of succession:

A.	Erosion	B.	Drought
C.	Deposition	D.	Micro-organisms

37.

Due to modification of the environment by the plant community itself, when one community is replaced by another suitable community, the succession is called:

A.	Induced	B.	Deflated
C.	Allogenic	D.	Autogenic

38.

The effect of individuals of the same species upon each other is called:

A.	Reaction	B.	Competition
C.	Coaction	D.	Ecesis

39.

The ultimate seral community appears in an area as a result of:

A.	Reaction	B.	Nudation
C.	Invasion	D.	Ecesis

40.

When the process of succession sidetracks the advancement line, it is called:

A.	Primary	B.	Deflated
C.	Secondary	D.	Induced