Pollution can effect the food chain and the food web In many ways. The first of wich is it can kill off animals. A good example of this is marine life.
Prophase
During the prophase stage of mitosis, the nucleus seems to disband itself. The nucleolus suspends itself and finally, the nuclear membrane disassembles itself. This is because of the undergoing process of copying and dividing.
Mitosis is a functional cell dividing process that helps the cells repair or rejuvenate itself because of apoptosis and other factors.
Most of it follows its cycle, going back to the atmosphere.
The image below, shows you how the nitrogen cycle is.
Hope it helped,
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I agree with the other person you answered the answer is B duckweed growth