WORKSHEET CLASS -7
A. Tick the correct option.
1. Fermentation is caused by:
a. Cockroach b. Human beings
c. Earthworm d. Yeast
2. The blind air sacs of bronchiole are:
a. Alveoli b. Spiracles
c. Bronchi d. Epiglottis
3. The muscular flap which guards the opening of windpipe:
a. Diaphragm b. Epiglottis
c. Glottis d. Alveoli
4. Inhalation and Exhalation are components of:
a. Respiration b. Circulation
c. Transpiration d. Breathing
5. Organisms that live without oxygen :
a. Bacteria b. Plants
c. Cockroach d. Human beings
B. Match the animals with their respiratory organ.
Column A Column B
i. Cockroach a. Gills
ii. Earthworm b. Lungs
iii. Fish c. Spiracles
iv. Amoeba d. Moist skin
v. Human beings e. Cell membrane
C. Fill the correct option:
i. __________ aerobic respiration/anaerobic respiration produces more energy.
ii. During exhalation, diaphragm __________ (relaxes/contracts).
iii. __________ (coughing/asthma) is an allergic disease.
iv. __________ (Gills/lungs) help the animals living in water to use the oxygen
dissolved in water.
v. Stomata help the plants __________ (to exchange gases/carries air to lungs).
D. Write ‘T’ for true and ‘F’ for false statement:
i. During inspiration, the ribcage moves upward and outward. ( )
ii. Breathing rate slows down during the time of exercise. ( )
iii. The thin walls of alveoli are richly supplied with blood. ( )
iv. During respiration, ADP is converted to ATP. ( )
v. In plants, all living cells take in oxygen independently and give
out carbon dioxide. ( )
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