Question

A. CHOOSE THE MOST APPROPRIATE ANSWER

1. Which of the following is not a function of transpiration?
(a) Cooling of leaves
(b) Uptake of water
(c) Intake of water
(d) Excretion of minerals

2. Which of the following does not affect the rate of transpiration?
(a) Light
(b) Humidity
(c) Wind
(d) Age of the plant

3. Which of the following is an antitranspirant?
(a) Auxin
(b) Gibberellin
(c) Abscisic acid (d) Cytokinin

4. The rate of transpiration increases with
(a) increase in humidity of air
(b) increase in wind velocity
(c) reducing light intensity
(d) decrease in wind velocity
5. Loss of water as droplets from hydathodes is called
(a) Transpiration (b) Bleeding
(c) Guttation
(d) Evaporation

B. VERY SHORT ANSWER QUESTIONS

1. Name the following:

1) The waxy layer on the epidermis of the leaf meant to reduce transpiration.

(ii) The plant in which stomata are absent.

(iii) A plant with sunken stomata.

(iv) Permanently open structures seen on the bark of an old woody stem.

(v) The loss of water from injured parts of a plant.

(vi) An apparatus that measures the rate of water uptake in a cut shoot due to transpiration .
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Answer 1

Answer:1) C

2) D

3) C

4) B

5) C

Part B

I) cuticle

II) Hydrophyte

III) Xerophyte

IV) lenticels

V) Guttation

VI) Potometer

Explanation:

Answer 2

Answer:

d excretion of minerals