Environmental Science and Ecology - Mock Test 12

Question 111

In a food chain, the largest population is that of

A) decomposers B) producers C) primary consumers D) tertiary consumers

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Question 112

In a biotic community, the primary consumers are

A) carnivores B) omnivores C) detritivores D) herbivores

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Question 113

Which of the following is the most stable ecosystem

A) Forest B) Desert C) Mountain D) Ocean

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Question 114

The primary succession refers to the development of communities on a

A) fleshly cleared crop field B) forest clearing after devastating fire C) pond, freshly filled with water after a dry phase D) newly-exposed habitat with no record of earlier vegetation

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Question 115

If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected, because

A) energy flow will be blocked B) herbivores will not receive solar energy C) mineral movement will be blocked D) rate of decomposition will be very high

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Question 116

Bulk CO2 fixation occurs in

A) crop plants B) oceans C) tropical rain forests D) temperate forests

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Question 117

The pyramid which cannot be inverted in a stable ecosystem is that of

A) biomass B) number C) energy D) all of the above

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Question 118

Pyramid of numbers in a pond ecosystem is

A) irregular B) inverted C) upright D) spindle shaped

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Question 119

Study of inter-relationships between organisms and their environment is

A) ecology B) ecosystem C) phytogeography D) ethology

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Question 120

Pick up the correct food chain

A) Grass → Chameleon → Insect → Bird B) Grass → Fox → Rabbit → Bird C) Phytoplankton → Zooplankton → Fish D) Fallen leaves → Bacteria → Insect larvae

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