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  • Mark 'T' if the statement is true and 'F' if it is false:

7. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) During heavy exercise the breathing rate of a person slows down. (T/F)
(ii) Plants carry out photosynthesis only during the day and respiration only at night. (T/F)
(iii) Frogs breathe through their skins as well as their lungs. (T/F)
(iv) The fishes have lungs for respiration. (T/F)
(v) The size of the chest cavity increases during inhalation. (T/F)

Answers (2)

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(i) During heavy exercise the breathing rate of a person slows down. False

- During heavy exercise, we breathe faster and deeper than usual

(ii) Plants carry out photosynthesis only during the day and respiration only at night. False

- Respiration is an essential process required for the plants to live. It occurs day and night. Whereas, photosynthesis takes place only during the day.

(iii) Frogs breathe through their skins as well as their lungs. True

(iv) The fishes have lungs for respiration. False

- Fishes do not have lungs. They breathe through gills.

(v) The size of the chest cavity increases during inhalation. True

- During inhalation, ribs move up and outwards and the diaphragm moves down. This movement increases space in our chest cavity and air rushes into the lungs.

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HARSH KANKARIA

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