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Class 10, MCQ on Transpiration Set 2, 1. Rate of transpiration will be highest during, a) summer, b) winter, c) monsoon, d) all of these, 2. A waxy transparent covering on leaf to reduce transpiration, a) epidermis, b) mesophyll, c) cuticle, d) none of these, 3. Transpiration is defined as, a) Loss of moisture from a plant, b) Loss of water from the leaves of a plant, c) Loss of water vapour from the leaves of a plant, d) Loss of water vapour from the aerial parts of a plant, 4. 95% of transpiration occurs through, a) stomata, b) cuticle, c) lenticels, d) all of above, 5. In Nerium, stomata are present, a) on upper surface of leaves, b) on lower surface of leaves, c) on upper as well as lower surface of leaves, d) in sunken pits, 6. The leaves of ____________ have a thick cuticle, a) xerophytes, b) hydrophytes, c) submerged plants, d) all of these, 7. Root hairs are the extensions of the outer epidermal cells of the roots, a) True, b) False, 8. Calcium chloride paper is used to demonstrate transpiration, HARSHITA KOTHARI

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a) True, b) False, 9. The function of stomata is, a) Exchange of gases, b) Photosynthesis, c) Respiration, d) Transpiration, 10. Plants loose water by guttation when, a) rate of transpiration is high, b) soil is wet and atmosphere is humid, c) soil is dry and atmosphere is dry, d) soil is wet and atmosphere is dry, 11. Match the correct pairs, (i) Transpiration, , (a) Cactus, , (ii) Movement of water, , (b) Stomata, , (iii) Low rate of transpiration, , (c) Xylem, , (iv) High rate of transpiration, , (d) Hydathodes, , (v) Guttation, , (e) Maize, , a) a, c, b, e , d, b) b , c ,a , e , d, c) a , d, c ,b , e, d) b,c , e , a , d, 12. Advantages of transpiration to a plant are:, i) Results in ascent of sap, ii) Cools the plant in summer, iii) Helps in distriburion of water to all parts of a plant, iv) Helps to eliminate excess water, a) only iv, b) i and iv, c) I , ii and iv, d) I , ii , iii and iv, 13. Which of the following statements is not true for cuticle of a plant, a) it is mainly composed of cutin, b) wax like covering of leaves, c) polymer of long chain of fatty acids, d) it is mainly composed only of cutin, HARSHITA KOTHARI

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14. Choose the correct logical sequence for terms given below w.r.t loss of water due to transpiration, i) stomata ii) mesophyll cells iii) xylem iv) substomatal space v) intercellular space, a) ii , i , iii , v, , , iv, , b) iii , ii , v , iv , i, c) i , iii , ii , iv , v, d) ii , v , I , iii , iv, 15. The function of the reservoir in a Ganong’s photometer is to, a) supply water to the twig, b) measure the rate of transpiration, c) reset the air bubble and restart the experiment, d) none of the above, 16. Label the diagram:, a), , thick inner wall , stomata , nucleus , Chloroplast ,, , thin outer wall, , b), , Chloroplast , thick inner wall , nucleus , thin outer wall , stomata, , c), , Chloroplast , thin outer wall , , nucleus , thick inner wall , stomata, , d), , nucleus , thick inner wall , Chloroplast , thin outer wall , stomata, , 17. Label the diagram, a) epidermis , xylem , stoma , substomatal space, b) spongy mesophyll cells , phloem , lower epidermis ,, substomatal space, c) mesophyll cells , xylem , guard cells , inter cellular space, d) pallisade mesophyll cells , xylem , guard cells , inter cellular, space, , HARSHITA KOTHARI