Question

3. Give reason/explain :

(a) Excretion is a necessary process of our body.

(b) If we donate one kidney to a needy patient it would
not cause any harm to us.

(c) We urinate fewer times in summer than in winter
and the urine passed is generally thicker.​

Answer 1

Answer:

Explanation:

(a)The process of removing waste products produced in the cells of living organisms is called excretion. ... Hence it is necessary to remove such poisonous waste materials from our body

(b)Donating one kidney does not cause any harm as a single kidney can perform all the necessary vital functions

(c)In summer we lose considerate part of water through perspiration. Hence, kidneys have to reabsorb more water from the urine which makes the urine thicker and concentrated. While in winter very less amount of water is lost through perspiration. Therefore, we urinate fewer times in summer than in winters.

Hope it Help!

Answer 2

Explanation:

a)All organisms need to perform the life processes to prevent extinction, or dying out. ... Excretion is the removal of waste products by an organism. Some waste products are sweat, urine, and carbon dioxide. Without the excretory system many problems can develop in the body.

b)Donating one kidney does not cause any harm as a single kidney can perform all the necessary vital functions. When one kidney is removed the other enlarges and its capacity to filter blood goes up. So, donating one kidney to a needy patient does not cause any harm

c)Frequent urination can have causes that aren't due to underlying disease. Examples include drinking large amounts of liquid, caffeine intake, pregnancy or anxiety.