Identify the food source for each animal and the primary nutrient it provides. Explain the function of this nutrient. Which animal is a ruminant? (b) Identify the parts of the respiratory system label

Here are the answers to the questions:

1. (a)

(i)

• A (Cow): Grass
• B (Rabbit): Hay
• C (Chicken): Grains

(ii)

• A (Cow): Carbohydrates
• B (Rabbit): Carbohydrates
• C (Chicken): Carbohydrates

(iii)

• Carbohydrates: Provide energy for metabolic activities and body functions.

(iv)

• The animal that can be classified as a ruminant is A (Cow).

1. (b)

(i)

• I: Larynx
• II: Trachea
• III: Bronchus
• IV: Bronchiole
• V: Alveoli

(ii)

• II (Trachea): Carries air from the larynx to the bronchi and lungs. It is lined with cilia and mucus to trap dust and foreign particles.
• III (Bronchus): Divides into smaller tubes (bronchioles) and carries air from the trachea into the lungs.
• V (Alveoli): The primary site of gaseous exchange, where oxygen diffuses into the bloodstream and carbon dioxide diffuses out.

(iii)

• (α) used by the body: Oxygen
• (β) brought out from the body: Carbon dioxide