Entry Test MCQ :: Ecosystem

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21.

Symbiosis relationship in which only one organism is benefited is

A.	Symbiosis	B.	Commensalism
C.	Mutualism	D.	Unism

22.

Sharks may have small fish attached to them called

A.	Rumors	B.	Romas
C.	Romosis	D.	Remoras

23.

Over grazing leads to

A.	Good pastured lands	B.	Rocky areas
C.	Totally barren lands	D.	Salinity

24.

Nitrogen constitutes about ______ % of atmosphere

A.	58%	B.	25%
C.	10%	D.	78%

25.

Oxidation of ammonia or ammonium ions by bacteria in soil is called

A.	Nitrification	B.	Ammonification
C.	Assimilation	D.	Denitrification

26.

Gross primary production is

A.	Amount of energy fixed by small plants	B.	Amount of energy fixed by large plants
C.	Total amount of energy fixed by all plants	D.	Primary production minus respiratory loss

27.

Plant biomass is

A.	Gross primary production	B.	Net primary production
C.	Gross primary production minus respiratory loss	D.	Both b and c

28.

Total solar energy trapped by the producers in an ecosystem is

A.	95%	B.	20%
C.	78%	D.	1%

29.

The major unit of ecology is

A.	Population	B.	Community
C.	Ecosystem	D.	Biome

30.

Eco' part of word ecosystem means

A.	Family household	B.	Study of
C.	Collection of related parts that function as a unit	D.	Environment