Question

Read the assertion and reason carefully to mark the correct option in question

Assertion: In mammals, complex respiratory system has developed.

Reason: Mammalian skin is impermeable to gases.

Answer 1

Assertion: In mammals, complex respiratory system has developed.

Elaboratuin:

• Complex respiratory system includes many organs and the process of respiration has many steps.
• Nasal cavity, pharynx, larynx, trachea, bronchial tree, alveolus are the various parts of the respiratory system.
• To satisfy this oxygen demand and to make the process of respiration efficient they have a complex respiratory system.

Reason: Mammalian skin is impermeable to gases.

Elaboration
Exchange of gases cannot take place through the skin. Even if the skin was permeable to gases, it would not suffice the oxygen demand of the human body.