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191.

Which of the following is an artificial ecosystem?

A.	Rice-field	B.	Forest
C.	Grassland	D.	Lake

192.

Tip of ecological pyramid is occupied by:

A.	Herbivores	B.	Carnivores
C.	Producers	D.	Decomposers

193.

Source of energy in an ecosystem is:

A.	Sun	B.	ATP
C.	Sugar made by plant	D.	Green plant

194.

Savannahs are:

A.	Topical rain forest	B.	Desert
C.	Grassland with scattered trees	D.	Dense forect with close canopy

195.

Peacock eats a snake and snake eats frog and frog eats insect while insect eats green plant, then position of peacock is:

A.	Primary producer	B.	Secondary Producer
C.	Decomposer	D.	Apex of food pyramids

196.

A food chain has the following trophic levels:

A.	3 or 4	B.	3
C.	2	D.	1

197.

In a comparative study of grassland ecosystem and pond ecosystem it may be observed that:

A.	Primary and secondary consumers are similar	B.	Both biotic and abiotic components are different
C.	The biotic components are almost similar	D.	The abiotic components are almost similar

198.

Mr. X is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying:

A.	First trophic level	B.	Second trophic level
C.	Third trophic level	D.	Fourth trophic level

199.

This is an inverted pyramid:

A.	Pyramid of numbers in a grassland ecosystem	B.	Pyramid of energy in a pond ecosystem
C.	Pyramid of biomass in a grassland ecosystem	D.	Pyramid of biomass in a pond ecosystem

200.

In food chain initial organisms are:

A.	Top consumers	B.	Secondary consumers
C.	Primary consumers	D.	Photo synthesizers