Student Corner

1. Which of the following statements are correct regarding respiration in plants?

I. Respiration is the process of releasing energy from food.

II. Respiration takes place individually in all parts of the plants like stem, roots, leaves etc.

III. The rate of respiration is slow in plants whereas it is faster in humans and animals.

Select the correct answer from the codes given below:

A. I and III are correct

B. I and II are correct

C. I, II and III are correct

D. None of the above

Ans. C

2. Name the process through which much needed oxygen is supplied to all the cells of the plants?

A. Diffusion

B. Endosmosis

C. Exosmosis

D. Photosynthesis

Ans. A

3. Due to Water logging:

A. An air is expelled from in-between the particles of soil.

B. Oxygen becomes unavailable to the roots of the plants.

C. Plants respire anaerobically which produces alcohol and kill them.

D. All the above are correct.

Ans. D

4. Respiration in Plants takes place through:

A. Stomata

B. Lenticels

C. Both A and B

D. Only A

Ans. C

5. Consider the following statements:

A. Respiration takes place both day and night.

B. Photosynthesis occurs during day time only.

C. Both A and B are correct.

D. Neither A nor B are correct.

Ans. C

6. Some plants store waste in their fruits in the form of solid bodies called:

A. Raphides

B. Lenticels

C. Stomata

D. Resins

Ans. A

7. Various methods used by plants to get rid of their waste products are:

I. Gaseous waste through stomata and lenticels.

II. Stored solid and liquid waste by shedding leaves, peeling of bark and falling of fruits.

III. By secreting waste in the form of gum and resins.

Which of the following statements is/are correct?

A. I and II are correct.

B. II and III are correct.

C. I and III are correct.

D. I, II and III are correct.

Ans. D

8. Name the waste products secreted by Plants?

A. Carbon Dioxide

B. Oxygen

C. Water Vapour

D. All are correct.

Ans. D

9. Which of the following statements is/are correct?

I. The net gaseous exchange in leaves at night is, oxygen diffuses in and carbon dioxide diffuses out.

II. Net gaseous exchange during day time is, oxygen diffuses out and carbon dioxide diffuses in.

Select the correct answer from the codes given below:

A. Only I is correct.

B. Only II is correct

C. Both I and II are correct.

D. Neither I nor II is correct.

Ans. C

10. Name an extension of the epidermal cells of a root which is in direct contact with the soil?

A. Root Hairs

B. Internodes

C. Bundle Scars

D. Pith

Ans. A