Arun was playing in the garden. Suddenly he saw a dragon fly sitting on a plant. He observed the wings of it. He thought in looked similar to a wing of a crow. Is he correcct? Give reason for your answer.

(i) Arun playing in the garden. Suddenly he saw a dragon fly sitting on a plant. He observed the wings of it. He though it looked similar to a wing of a crow. Is he correct? Give reason for your answer. (ii) A breeder wishes to incorporate disirable characters into the crop plants. prepare a list of characters he will incorporate.

Ramu cultivated pea plants as an inter crop in his paddy field. After harvesting, he allowed the roots of the pea plants remain in the soil for some period. a. Is the action of Ramu reasonable? b. Justify your answer.

Raman went to a garden. He saw that the stem of the Banyan tree becomes thicker every year whereas such a change is not seen in a coconut tree. Can you give a explanation for this.

Balu went to kuttraalam with his grandpa, when he saw the waterfalls falling down from the top of a mountain he could not believe his eyes. He loved admiring it. He adked grandpa how this is possible. Grandpa said even now the answer to this question from where the water is coming from the top of a mountain is a puzzle, but we got some scientific truths behind this flow. (ii) Give the formula for time of flight of the waterfall.