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71.

The processes involving the transformation of carbon compounds on earth include:

A.	Only the plants	B.	Both biological and non-biological processes
C.	Only the living organisms	D.	Only the animals

72.

In a forest ecosystem, green plants are:

A.	The primary producers	B.	Primary producers only sometimes
C.	The decomposers	D.	The consumers

73.

Which of the following is logical sequence of carbon cycle:

A.	Photosynthesis-consumer-decomposer	B.	Decomposer-consumer-photosynthesis
C.	Photosynthesis-decomposer-consumer	D.	Consumer-photosynthesis-decomposer

74.

The pyramid of numbers in a grassland ecosystem will be:

A.	Linear	B.	Upright
C.	Irregular	D.	Inverted

75.

The number of kinds of food chains:

A.	One	B.	Two
C.	Three	D.	Four

76.

Biosphere is that:

A.	By which life originated	B.	Where individuals interact with each other
C.	Which relates to spherical organisms	D.	Organic compound by which the life diminishes

77.

An ecosystem is:

A.	A functional unit of biotic and abiotic components which have an energy source	B.	Either a part of land surface, a body of fresh water or the open oceans
C.	A functional unit consisting of sunlight, air water and minerals	D.	A system consisting of an energy source, producers and consumers

78.

The first fish that eats upon the planktonic forms is:

A.	Primary consumer	B.	Carnivore
C.	Decomposer	D.	Secondary consumer

79.

Trophic levels are formed by:

A.	Only plants	B.	Only animals
C.	Only carnivores	D.	Organisms linked in food chains

80.

The study of interaction between living organisms and environment in a specific area is the study of:

A.	Phytobiology	B.	Phytogeography
C.	Ecosystem	D.	Phytosociology