what do you mean by "infestation of roots of tobacco plants by a nematode" ?
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Q3
what do you mean by submerged plants?
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Q4
What do you mean by seismonastic movement? Name the types of movements in plants.
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Q5
A report suggests that about 10 per cent of India's recorded wild flora and 20 percent of its mammals are on the threatened list. Do you think India is a safe heaven for wildlife?