Environmental Science and Ecology - Mock Test 27

Question 261

The correct sequence of plants in a hydrosere is ?

A) Oak → Lantana → Volvox → Hydrilla → Pistia → Scirpus B) Oak → Lantana → Scirpus → Pistia → Hydrilla → Volvox C) Volvox → Hydrilla → Pistia → Scirpus → Lantana → Oak D) Pistia → Volvox → Scirpus → Hydrilla → Oak → Lantana

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Question 262

The rate of formation of new organic matter by rabbit in a grassland, is called ?

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

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Question 263

Niche is defined as the ?

A) Position of species in a community in relation to other species B) Place where organism lives C) Place where organism lives and performs its duty D) Place where population perform their duties

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Question 264

Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem?

A) Tertiary production B) Gross production (GP) C) Net production (NP) D) Secondary production

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Question 265

Plant species having a wide range of genetical distribution evolve into a local population known as ?

A) Ecotype B) Biome C) Ecosystem D) Population

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Question 266

Which one of the following is commonly found in temperate coniferous forest?

A) Quercus B) Dipterocarpus C) Shorea robusta D) Pinus wallichiana

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Question 267

Deserts, grasslands, forests and tundra are the examples of ?

A) Biomes B) Biogeographical regions C) Ecosystems D) Biospheres

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Question 268

Which of the following is primary consumer?

A) Producer B) Carnivore C) Top carnivore D) Herbivore

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Question 269

Actively moving organism in aquatic ecosystem ?

A) Benthos B) Phytoplankton C) Zoo plankton D) Nekton

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Question 270

In a lake, phytoplankton grow in abundance in ?

A) Littoral zone B) Limnetic zone C) Profundal zone D) Benthic region

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