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2331. Water cycle refers to
A. an integrated attempt to recycle water in relatively arid regions.
B. constant movement of water from ocean to land and back to ocean again.
C. scientific management of water in areas excessively plagued with water logging.
D. water distribution in relatively dry areas.
Explanation:
2332. Which of the following pesticides is not used as a fumigant ?
A. Malathion
B. Aluminium phosphide
C. Methyl bromide
D. Ethylene di-bromide (EDB)
Explanation:
2333. Which of the following agricultural practices have been primarily responsible for pollution of our water resources ? 1. Use of livestock manure 2. Use of chemical fertilisers 3. Excessive use of chemical pesticides 4. Deforestation
A. 1 and 2
B. 1, 2 and 4
C. 2 and 3
D. 1, 3, and 4
Explanation:
2334. The average salt content of sea water is
A. 1%
B. 3.5%
C. 10%
D. 12.3%
Explanation:
2335. The plastids which make the flowers and fruits conspicuous to animals for pollination and dispersal are
A. leucoplasts
B. chromoplasts
C. chloroplasts
D. None of these
Explanation:
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