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Science Question Answers
Which feature of some species of blue-green algae helps promote them as bio-fertilizers?
Which feature of some species of blue-green algae helps promote them as bio-fertilizers?
They convert- atmospheric methane into ammonia which the crop plants can absorb readily
They induce the crop plants to produce the enzymes which help convert atmospheric nitrogen to nitrates
They have the mechanism to convert atmospheric nitrogen into a form that the crop plants can absorb readily
They induce the roots of the crop plants to absorb the soil nitrates in larger quantities
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Consider the following:
1. Oxides of Hydrogen
2. Oxides of Nitrogen
3. Oxides of Sulphur
Which of the above causes/cause acid rain ?
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Food crop - Rat -Snake - Hawk. In this food chain, the highest concentration of the pesticide would accumulate in which one of the following?
Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria. Why is it difficult to develop an effective malaria vaccine ?
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