Environmental Science and Ecology - Comprehensive Mock Test 12

Question 111 Medium

Gradual and predictable changes in the species composition of a given area is ?

A) Primary succession B) Ecological succession C) Xerarch succession D) Secondary succession

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Question 112 Medium

The more abundant animals in a desert grassland are ?

A) Arboreal B) Diurnal C) Aquatic D) Fossorial

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Question 113 Easy

Hydrarch succession takes place in ?

A) Dry areas B) Wetter areas C) Bare area D) None of these

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Question 114 Easy

The most recently discovered ecosystem is ?

A) Vents B) Crater C) Tundra D) Floating iceberg

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Question 115 Medium

DDT residues are rapidly passed through food chain causing biomagnification because DDT is ?

A) Water soluble B) Lipo soluble C) Moderately toxic D) Non-toxic to aquatic animals

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Question 116 Easy

The nature’s cleaners are ?

A) Producers B) Consumers C) Decomposers and scavengers D) Symbionts

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Question 117 Medium

The remains of the dead plants and animals is called ?

A) Detritus B) Detritivores C) Humus D) Litter

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Question 118 Easy

Acacia arabica is ?

A) Hydrophyte B) Mesophyte C) Xerophyte D) None of these

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Question 119 Hard

The species, though insignificant in number, determine the existence of many other species in a given ecosystem. Such species is known as ?

A) Keystone species B) Sacred species C) Endemic species D) Extinct species

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Question 120 Medium

Transfer of energy in different trophic levels of an ecosystem is called ?

A) Bioenergetics B) Biosystem C) Geobiocoenosis D) Holocoenotic

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