Life Processes in Animals Class 7 Assertion and Reason Questions

Life Processes in Animals Class 7 Assertion and Reason Questions

Life Processes in Animals Class 7 Assertion and Reason Questions

Following questions are of Assertion (A), Reason (R) type questions. Choose the correct answer from the following options.

(a) Both A and R are true, and R is the correct explanation of A.

(b) Both A and R are true, but R is not the correct explanation of A.

(c) A is true, but R is false.

(d) A is false, but R is true.

1. (A): The diaphragm is a dome-shaped muscle that plays a crucial role in breathing.

(R): The diaphragm moves downwards during inhalation, increasing the space in the chest cavity and allowing air to enter the lungs.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

2. (A): Saliva helps in the digestion of food in the mouth.

(R): Saliva contains enzymes that break down starch into simpler sugars.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

3. (A): Ruminants like cows spend a significant amount of time chewing their food.

(R): Ruminants have a specialized stomach that allows them to digest grass efficiently.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

4. (A): Breathing and respiration are the same processes.

(R): Breathing refers to the physical act of inhaling and exhaling air, while respiration involves the biochemical process of energy production in cells.

Answer:

(d) A is false, but R is true.

5. (A): The alveoli are essential for gas exchange in the lungs.

(R): Alveoli have thin walls that allow oxygen and carbon dioxide to diffuse easily between the air and blood.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.