48. (a) Give the main points of difference between respiration in plants and respiration in animals.
(b) Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and (b) at night.
(c) Which contains more carbon dioxide: exhaled air or inhaled air? Why?

Question

48.	(a) Give the main points of difference between respiration in plants and respiration in animals.
(b)	Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and (b) at night.
(c)	Which contains more carbon dioxide: exhaled air or inhaled air? Why?

MyClass24 · Accepted Answer

Answer (a)




Respiration in plants


Respiration in animals




Respiration is done individually in all parts of the plant.


Respiration is done by a single system.




A small amount of gases is transported to all parts of the plant.


The gases are transported to all parts of the body covering long distances.




The respiration occurs at a slow rate.


The respiration occurs at a faster rate.




(b) (a) During day time the plants use the oxygen produced during the process of photosynthesis. Carbon dioxide produced during respiration is used for the process of photosynthesis. Some amount of carbon dioxide is also taken from the air. So during day time, oxygen diffuses out and carbon dioxide diffuses in.
(b) At night, as photosynthesis does not takes place, oxygen is not produced. Thus, oxygen from the air diffuses into the leaves to carry out respiration. And carbon dioxide produced by respiration diffuses out into the air. So, at night, oxygen diffuses in and carbon dioxide diffuses out.
(c) Exhaled air contains more carbon dioxide because we exhale to remove the waste product. During respiration oxygen breaks down glucose and hence more amount of carbon dioxide is released.

Respiration in plants	Respiration in animals
Respiration is done individually in all parts of the plant.	Respiration is done by a single system.
A small amount of gases is transported to all parts of the plant.	The gases are transported to all parts of the body covering long distances.
The respiration occurs at a slow rate.	The respiration occurs at a faster rate.

48. (a) Give the main points of difference between respiration in plants and respiration in animals. (b) Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and (b) at night. (c) Which contains more carbon dioxide: exhaled air or inhaled air? Why?