Sawaal
4
Q:

Biological control is to check growth of 

A) plants B) animals
C) weeds D) one pest by another

Answer:   D) one pest by another



Explanation:

Biological Control: This method is very effective. One pest is destroyed by another organism. For example the aphids are killed by lady beetle. The prickly pear is eradicted by cochineal insect. Here the advantage is, one does not use harmful chemicals which may get into the host plants.

Subject: Biology
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