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Subject :NSO    Class : Class 8

Plant X is a vascular and invasive plant species that grows densely over the surface of a lake at a very high rate, due to pollution in water. It has been linked to oxygen depletion of the water, in spite of the fact that it is photosynthetic. Which of the following accounts for this contradiction?

AWhile being photosynthetic, X consumes oxygen at a faster rate than it releases the same, because of its high rate of growth.
BBecause X is highly invasive, it incorporates a large quantity of oxygen in its biomass.
CWhen X dies, the bacteria that decompose its dead body consume the oxygen dissolved in water and grow rapidly.
DNone of these


Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 2:

Class : Class 5

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