Match the items given in Column I with those given in Column II: Column I Column II (i) Yeast (a) Earthworm (ii) Diaphragm (b) Gills (iii) Skin (c) Alcohol (iv) Leaves (d) Chest cavity (v) Fish (e) Stomata (vi) Frog (f) Lungs and skin (vii) Insects (g) Tracheae

(i) - (c) Yeast is a single-celled fungus. It converts sugar through fermentation, into carbon dioxide and alcohol. (ii) - (d) A large muscular sheet called diaphragm forms the floor of the chest cavity. Breathing involves the movement of diaphragm and the rib cage. (iii) - (a) Earthworms breathe through their skin. Oxygen and carbon dioxide pass through the earthworm's skin by diffusion. For diffusion to occur, the earthworm's skin must be kept moist. (iv) - (e) Stomata are typically found in plant leaves that controls the rate of gas exchange. Specialized cells known as guard cells surround stomata and function to open and close stomatal pores. (v) - (b) There are many organisms that live in water. Gills in fish help them to use oxygen dissolved in water. Gills are projections of the skin. Gills are well supplied with blood vessels for exchange of gases. (vi)-(f) Frogs can stay in the water as well as on land. Although frogs have a pair of lungs like human beings, they can also breathe through their skin, which is moist and slippery. (vii)-(g) Insects have a network of air tubes called tracheae for gas exchange. Oxygen rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue, and reaches every cell of the body. Similarly, carbon dioxide from the cells goes into the tracheal tubes and moves out through spiracles. Column I Column II (i) Yeast (c) Alcohol (ii) Diaphragm (d) Chest cavity (iii) Skin (a) Earthworm (iv) Leaves (e) Stomata (v) Fish (b) Gills (vi) Frog (f) Lungs and skin (vii) Insect (g) Tracheae

Respiration is the biological process in which glucose is broken down inside the cell to produce energy. Depending upon the availability of oxygen, there are two different types of respiration, and they are anaerobic and aerobic respiration.

MEDIUM

Earn 100

Why do body cells require oxygen?

Important Questions on Respiration in Organisms

EASY

Science>Biology>Respiration in Organisms>Why do we respire?

The main purpose of respiration is to convert _____.

MEDIUM

Science>Biology>Respiration in Organisms>Why do we respire?

Take three test-tubes. Fill 3/4^th of each with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO₂?

EASY

Science>Biology>Respiration in Organisms>Why do we respire?

In which type of respiration, aerobic or anaerobic, more energy is released from the same amount of glucose (food) why?

MEDIUM

Science>Biology>Respiration in Organisms>Why do we respire?

What are the two steps of respiration?

MEDIUM

Science>Biology>Respiration in Organisms>Why do we respire?

List the differences between aerobic respiration and anaerobic respiration.

MEDIUM

Science>Biology>Respiration in Organisms>Why do we respire?

Discuss different types of respiration depending upon the availability of oxygen.

MEDIUM

Science>Biology>Respiration in Organisms>Why do we respire?

Match the items given in Column I with those given in Column II:

Column I	Column II
(i) Yeast	(a) Earthworm
(ii) Diaphragm	(b) Gills
(iii) Skin	(c) Alcohol
(iv) Leaves	(d) Chest cavity
(v) Fish	(e) Stomata
(vi) Frog	(f) Lungs and skin
(vii) Insects	(g) Tracheae