Match the following. Column 1 Column 2 1. Respiration through spiracles (i) Absence of oxygen 2. Respiration through skin (ii) Presence of oxygen 3. Internal respiration (iii) Insects 4. Anaerobic respiration (iv) Earthworms 5. Aerobic respiration (v) Cellular respiration

1 - (iii) Insects like cockroaches respire through spiracles. The spiracles are external openings of tiny tubes called trachea. 2 - (iv) Earthworms respire through their moist skin which is supplied with thin blood vessels. They take in atmospheric oxygen through their skin. 3 - (v) Internal respiration is also known as cellular respiration as it occurs at the cellular level of organisation. In this process glucose is broken into carbon dioxide, water and energy by utilising the oxygen transported by the red blood cells. 4 - (i) Anaerobic respiration is the respiration that takes place in the absence of oxygen. Anaerobic respiration takes place in the muscles during hard exercise and in lower organisms like yeast, bacteria. 5 - (ii) Aerobic respiration is the respiration that takes place in the presence of oxygen. Exchange of gases for respiration in plants occurs through stomata while in humans it occurs through alveoli. Hence the correct matching is: Column A Column B 1. Respiration through spiracles (iii) Insects 2. Respiration through skin (iv) Earthworms 3. Internal respiration (v) Cellular respiration 4. Anaerobic respiration (i) Absence of oxygen 5. Aerobic respiration (ii) Presence of oxygen

The process by which digested and absorbed food (glucose) is oxidized to carbon dioxide and water to release energy in the form of ATP is called respiration. There are two types of respiration based on the presence or absence of oxygen, namely, aerobic and anaerobic respiration.

E M B I B E

Interactive Science 7>Chapter 10 - Respiration in Organisms>SUMMATIVE ASSESSMENT>Q 4

MEDIUM

7th CBSE

IMPORTANT

Earn 100

Plants take in oxygen and release carbon dioxide during respiration.

50% studentsanswered this correctly

Important Questions on Respiration in Organisms

MEDIUM

7th CBSE

IMPORTANT

Interactive Science 7>Chapter 10 - Respiration in Organisms>SUMMATIVE ASSESSMENT>Q 5

Stomata are present only on the upper surface of leaves.

MEDIUM

7th CBSE

IMPORTANT

Interactive Science 7>Chapter 10 - Respiration in Organisms>SUMMATIVE ASSESSMENT>Match the following

Match the following.

Column 1	Column 2
1. Respiration through spiracles	(i) Absence of oxygen
2. Respiration through skin	(ii) Presence of oxygen
3. Internal respiration	(iii) Insects
4. Anaerobic respiration	(iv) Earthworms
5. Aerobic respiration	(v) Cellular respiration