ASSERTION &REASON

Assertion (A) : Food chain is responsible for the entry of harmful chemicals in our bodies.

Reason (R) : The length and complexity of food chains vary greatly.

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion (A) : Greater number of individuals are present in lower trophic levels.

Reason (R) : The flow of energy is unidirectional

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion: Lungs always contain a residual volume of air.
Reason: It provides sufficient time for oxygen to be absorbed and for carbon dioxide to be released.

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion (A) : A geneticist crossed a pea plant having violet flowers with a pea plant with white flowers, he got all violet flowers in first generation. 1 Reason (R) : White colour gene is not passed on to next generation

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion: Transpiration is a necessary evil.
Reason: It causes water loss but helps in absorption and upward movement of water and minerals

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion: Translocation of sugar occurs through the phloem.
Reason: It is achieved by the diffusion of sugars through phloem

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion: Digestion breaks large complex molecules to simple smaller molecules which can be easily absorbed.
Reason: Digestion is necessary for the absorption of all molecules.

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion: Energy is used during the process of respiration.
Reason: Respiration stores energy in the form of ATP.

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion: The muscular walls of ventricles are thicker than auricles.
Reason: This helps in preventing the back flow of blood.

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true

Assertion: In woody plants, gaseous exchange occurs through lenticels.
Reason: Lenticels are specialized cells found along with stomata on the stem of woody plants.

• (a) Both A and Rare true and R is the correct explanation of A

• (b) Both A and Rare true and R is not the correct explanation of A

• (c) A is true but R is false

• (d) A is False but R is true