(a) Aquatic species are more comfortable in cold water than in warm water.

Question

Give reasons for the following : 

(a) Aquatic species are more comfortable in cold water than in warm water. 

(b) At higher altitudes people suffer from anoxia resulting in inability to think.

Answer 1

(a) Increase in temperature decreases the solubility of oxygen in water. As a result, amount of dissolved oxygen decreases. It becomes more difficult to breathe as oxygen is less.

Hence, the aquatic species are not comfortable in warm water.

(b) At high altitudes, the partial pressure of oxygen is less than at the ground level. As a result, there is a low concentration of oxygen in the blood and tissues of the people living at high altitudes. Thus, they feel weak and are unable to think properly, i.e., they suffer from anoxia.