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351.

Photochemical is a facility to
(a)Grow plants under disease free condition
(b)Conserve endangered species of plant
(c)Grow plants under controlled condition
(d)Induced mutations
Comment
Answer is: CNA

352.

The ratio of forest area needed for ecological balance in India
(a)11.1%
(b)22.2%
(c)33.3%
(d)44.4%
Comment
Answer is: CNA

353.

What is the most stable ecosystem?
(a)Forest
(b)Grassland
(c)Desert
(d)Sea
Comment
Answer is: DNA

354.

The driving force of an ecosystem is
(a)Solar energy
(b)Biomass
(c)Producer
(d)Carbohydrates in producers
Comment
Answer is: ANA

355.

Which one of the following plants is popularly grown along the road for absorbing vehicular pollutants?
(a)Nerium
(b)Neem
(c)Bougainvillea
(d)Calotropis
Comment
Answer is: CNA

356.

Which in one of the following is a xerophytic plant?
(a)Mustard
(b)Amerbel
(c)Karil
(d)Neem
Comment
Answer is: CNA

357.

Which one among the following is the effect of the excess amount of CO2 up to 1%?
(a)Retards the growth
(b)Accelerates the growth
(c)Kills the plants
(d)Remained unaffected
Comment
Answer is: BNA

358.

A biotic component of our environment
(a)Plant
(b)Animal
(c)Both (a) and (b)
(d)Air
Comment
Answer is: DNA

359.

Hydro phonics is relate to
(a)Growth of plant without soil
(b)Growth of plant without water
(c)Conservation of water
(d)Relation of sound with water
Comment
Answer is: ANA

360.

Which one of the following is not biodegradable?
(a)Woollen mat
(b)Silver foil
(c)Leather bag
(d)Jute basket
Comment
Answer is: BNA

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