NCERT Solutions for Chapter: Respiration in Organisms, Exercise 3: SHORT ANSWER QUESTIONS

Pick the odd-one-out from the group given below on the basis of respiratory organ. Give a reason for your answer.

Cockroach, grasshopper, snail, ant.

Pick the odd-one-out from the group given below on the basis of respiratory organ. Give a reason for your answer.

Lizard, cow, earthworm, snake.

Pick the odd-one-out from the group given below on the basis of respiratory organ. Give a reason for your answer.

Crocodile, whale, dolphin, fish.

Pick the odd-one-out from the group given below on the basis of respiratory organ. Give a reason for your answer.

Snake, tadpole, crow, goat.

On an average, an adult human being at rest breathes $15-18$ times per minute. The breathing rate, however, may differ under different conditions. Arrange the following activities given in the box in order of increasing breathing rates and give a reason for your answer.

[Sleeping, cycling, brisk walk, watching TV]

On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.

Whenever we feel drowsy or sleepy, we start yawning. Does yawning help us in any way?

Insects and leaves of a plant have pores through which they exchange gases with the atmosphere. Can you write two points of differences between these pores with respect to their position, number and extension into the body?