State whether true or false:
Respiration and breathing are synonymous.

Breathing

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Photosynthesis

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Solution

The correct option is B
Photosynthesis

Breathing and respiration are not synonymous; breathing is a part of respiration. Breathing refers to the intake of atmospheric oxygen followed by the release of carbon dioxide. Respiration involves the following steps:
(i) Breathing
(ii) Diffusion of gases (oxygen and carbon dioxide)
(iii) Transport of gases by the blood
(iv) Diffusion of oxygen and carbon dioxide between blood and tissues
(v) Utilisation of oxygen by the cells for breaking down biomolecules and the resultant release of carbon dioxide

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(2) Plants carry out photosynthesis only during the day and respiration only at night.
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(4) At high altitudes, the lower air pressure makes it more difficult for oxygen to enter our respiratory systems.
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State whether true or false: Respiration and breathing are synonymous.

State whether true or false:
Respiration and breathing are synonymous.