Q. Give reasons (Any 3) [Explain in 3-4 lines.].
Answers
1) Insectivorous plants are attractively coloured so that they can attract insects and feed upon them. Insectivorous plants grow in soil or water which are deficient in nitrogen compounds and in order to meet this deficiency, they feed on insects.
2) Because of difference in physical conditions from place to place, the reference chosen as units for weights and measures varies. So, it becomes necessary to get the weights and measures standardized at regular intervals.
3) During summer, the wires heat up and expand in length. Hence it sags down. During winter, the temperature drops and wires cool down. Due to decrease in temperature,it contracts in length and hence becomes straight
4) An umbrella can increase your chances of being struck by lightning if it makes you the tallest object in the area. Always avoid being the highest object anywhere—or taking shelter near or under the highest object, including tall trees.