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Q 1913191040.     Mohan visited his grandparents during the
summer vacation. He saw a number of moths,
dragonflies, butterflies, etc. hovering round the
small c:•1ts and other worms in the soil. One day
the gardener came and he sprayed some
medicines to ward off the insects. After a week,
Mohan saw that there were no insects and
butterflies or dragonflies.
(a) What could be the reason for the
disappearance of butterflies and insects?
(b) Will the yield of plants from the garden be
affected by insects? Give reasons.
(c) How are these organisms are valuable to
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)