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31.

A food chain starts with:

A.	Nitrogen fixing organisms	B.	Photosynthesizing organisms
C.	Respiration	D.	Decomposers

32.

Which of the following world is related to Homo sapiens?

A.	Herbivore	B.	Carnivore
C.	Autotroph	D.	Omnivore

33.

The importance of ecosystem lies in:

A.	Cycling of materials	B.	Flow of energy
C.	Both (a) & (b)	D.	None of the above

34.

The following belong to the same trophic level:

A.	Tiger and wild beer	B.	Snake and earthworm
C.	Deer and honey bee	D.	Crow and cow

35.

Mark the correct statement:

A.	Phagotrophs are transducers	B.	Some herbivores are converters
C.	Microconsumers are saprotrophs	D.	All are correct

36.

The gross primary production is maximum in the following ecosystem:

A.	Open sea	B.	Grasslands and pastures
C.	Coniferous forests	D.	Tropical and sub-tropical forest

37.

In lake ecosystem, the pyramid of biomass is:

A.	Upright	B.	Inverted
C.	Anything possible	D.	None is correct

38.

If corbon dioxide is withdrawn from the biosphere, which organism would first experience negative effect?

A.	Primary consumers	B.	Producers
C.	Secondary consumers	D.	Tertiary consumers

39.

Man is a:

A.	Producer	B.	Consumer
C.	Herbivore	D.	None of these

40.

The two major functional components of an ecosystem are:

A.	Energy flow and food chain	B.	Mineral recycling and energy flow
C.	Food chain and decomposers	D.	Energy flow and decomposers