Mohan visited his grandparents during the summer vacation holidays. He saw a number of moths, dragonflies, butterflies, etc hovering round the beautiful flowers in the garden. He also saw many small ants and other worms in the soil. One day the gardener came and sprayed some medicines to ward off the insects. After a week, Mohan saw that there were no insects and butterflies or dragonflies. [Value Based](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 plants?
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Mohan visited his grandparents during the summer vacation holidays. He saw a number of moths, dragonflies, butterflies, etc hovering round the beautiful flowers in the garden. He also saw many small ants and other worms in the soil. One day the gardener came and sprayed some medicines to ward off the insects. After a week, Mohan saw that there were no insects and butterflies or dragonflies. [Value Based](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 plants?
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