Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the biogenic origin of life?
Options
(a) They were able to reproduce (b) They could […]
Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as : [2012]
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(a) Adaptive radiation (b) Natural selection (c) Migration (d) […]
Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
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(a) Thorn of Bougainvillea and tendril of Cucurbita – Analogous organs (b) Nictitating membrane […]
Climate of the world is threatened by
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(a) Increasing concentration of atmospheric oxygen (b) Decreasing amount of atmospheric oxygen (c) Increasing amount of atmospheric carbondioxide (d) Decreasing amount of atmospheric carbondioxide
Correct […]
Global warming can be controlled by :
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(a) Reducing reforestation, increasing the use of fossil fuel (b) Increasing deforestation, slowing down the growth of human population (c) Increasing deforestation, reducing efficiency of […]
Stirred tank bioreactors have been designed for
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(a) addition of preservatives to the product (b) purification of the product (c) ensuring anaerobic conditions in the culture vessel (d) availability of oxygen throughout […]
Which one of the following is a wrong statement?
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(a) Most of the forests have been lost in tropical areas (b) Ozone in upper part of atmosphere is harmful to animals (c) […]
Biochemical Oxygen Demand (BOP) in a river water
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(a) has no relationship with concentration of oxygen in the water (b) gives a measure of Salmonella in the water (c) increases when sewage […]
Measuring Biochemical Oxygen Demand (BOD) is a method used for :
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(a) estimating the amount of organic matter in sewage water (b) working out the efficiency of oil driven automobile engines (c) […]
dB is a standard abbreviation used for the quantitative expression of
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(a) the density of bacteria in a medium (b) a particular pollutant (c) the dominant Bacillus in a culture (d) a […]
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