Question 7 (i)
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.

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Solution

The statement is false.
During heavy exercise, the breathing rate of a person increases.

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Q. During heavy exercise the breathing rate of a person slows down.

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)

Question 10 (i)
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(i) Carbon dioxide is released during photosynthesis. (T/F)

State whether the following statements are true or false. Justify your statement. [5 MARKS]
(1) During heavy exercise, the breathing rate of a person slows down.
(2) Plants carry out photosynthesis only during the day and respiration only at night.
(3) Frogs breathe through their skin as well as their lungs.
(4) At high altitudes, the lower air pressure makes it more difficult for oxygen to enter our respiratory systems.
(5) Glucose breaks down into lactic acid in the absence of oxygen.

Q. During heavy exercise, the breathing rate can increase upto ........... per minute.

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Breathing

Standard VII Biology

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Question 7 (i) 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.

The statement is false. During heavy exercise, the breathing rate of a person increases.

Question 7 (i)
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.

The statement is false.
During heavy exercise, the breathing rate of a person increases.