Environmental Science and Ecology - Mock Test 32

Question 311

Acacia arabica is ?

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

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Question 312

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 313

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

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

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Question 314

The biomass available for consumption by the herbivores and the decomposers is called ?

A) Gross primary productivity B) Net primary productivity C) Secondary productivity D) Standing crop

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Question 315

The tiny free-swimming animals on the surface of water constitute ?

A) Phytoplankton B) Symbionts C) Benthos D) Zooplankton

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Question 316

When the two ecosystems overlap each other, the area is called ?

A) Habitat B) Niche C) Ecotone D) Ecotype

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Question 317

Which of the following ecosystems has highest rate of gross primary production?

A) Grasslands B) Mangroves C) Coral reefs D) Equatorial rain forests

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Question 318

Which of the following groups is absolutely essential functional component of the ecosystem?

A) Producers B) Producers and herbivores C) Producers and detritivores D) Detritivores

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Question 319

Which of the following is correctly matched?

A) Butterfly -------- camouflage B) Garden lizard -------- mimicry C) House lizard -------- autotomy D) None of these

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Question 320

About 70% of total global carbon is found in ?

A) Forests B) Grasslands C) Agroecosystems D) Oceans

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