Environmental Science and Ecology - Mock Test 53

Question 521

The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's?

A) Net primary productivity B) Gross secondary productivity C) Net secondary productivity D) Gross primary productivity

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Question 522

In a biotic community, primary consumers are?

A) Herbivores B) Detrivores C) Carnivores D) Omnivores

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Question 523

In an ecosystem, bacteria are considered as?

A) Microconsumers B) Secondary consumers C) Primary consumers D) None of these

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Question 524

In which of the following there is no difference?

A) Primary carnivore and trophic level II B) Secondary consumers and herbivores C) Primary consumers and herbivores D) Trophic level I and herbivores

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Question 525

In desert grasslands, which type of animals are relatively more abundant?

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

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Question 526

Which one of the following elements is the critical limiting factors in the function of ecosphere because of its irretrievable loss in the ocear?

A) Fe B) P C) Mg D) Ca

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Question 527

Which one of the following pairs is a sedimentary type of biogeochemical cycle?

A) Oxygen and nitrogen B) Phosphorus and sulphur C) Phosphorus and CO2 D) Phosphours and nitrogen

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Question 528

The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from nerbivores to carnivores is?

A) 25% B) 50% C) 10% D) 5%

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Question 529

Energy transfer from one trophic level to other in a food chain is?

A) 1% B) 2% C) 10% D) 20%

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Question 530

Niche of a species in an ecosystem refers to its?

A) Place of occurrence B) Competitive ability C) Centre of origin D) Function at its place of occurrence

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