Environmental Engineering

381. The pioneers in xerach succession is the

1. crustose lichen
2. mosses
3. foliose lichen
4. shrubs

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382. The pollution which does not persistent harm to life supporting system is

1. Noise pollution
2. Radiation pollution
3. Organochlorine pollution
4. All of these

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383. The process of successful establishment of the species in a new area is called

1. sere
2. climax
3. invasion
4. ecesis

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384. The pyramid of biomass is inverted in

1. forest ecosystem
2. grassland ecosystem
3. fresh water ecosystem
4. tundra

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385. The pyramid of energy in any ecosystem is

1. Always upright
2. May be upright or invented
3. Always inverted
4. None of the above

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386. The pyramid of energy in terrestrial ecosystem is

1. upright
2. inverted
3. spindle shaped
4. irregular

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387. The pyramid of numbers in a single tree is

1. upright
2. inverted
3. spindle shaped
4. none of these

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388. The pyramid of numbers is inverted in the case of

1. parasitic food chain
2. Grassland ecosystem
3. Forest ecosystem
4. lake ecosystem

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389. The range of normal human hearing is in the range of

1. 10 Hz to 80 Hz
2. 50 Hz to 80 Hz
3. 50Hz to 15000 Hz
4. 15000 Hz and above

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390. The source of energy in an ecosystem is

1. ATP
2. Sunlight
3. D.N.A
4. R.N.A

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