____________ described leaves as organs of transpiration.

Inghenhouz

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Von Helmont

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Stephan Hales

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Priestley

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Solution

The correct option is C Stephan Hales
Transpiration is the loss of excess of water in the form of vapour from the plant body, mostly from leaves. Stephan Hales conducted experiments on transpiration and described leaves as organs of transpiration. He also mentioned that plants exchange gases with their surrounding air.

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Similar questions

Give suitable explanation for the following :

(a) A higher rate of transpiration is recorded on a windy day rather than on a calm day.

(b) Excessive transpiration results in the wilting of the leaves.

(d) More transpiration occurs from the lower surface of a dorsiventral leaf.

(e) Cork and bark of trees help in preventing loss of water.

(f) Perspiration and transpiration help to cool the body temperature of the organism.

(g) On a bright sunny day, the leaves of certain plants roll up.

Name the following :

(a) Openings on the stem through which transpiration occurs.

(b) The process by which the intact plant loses water in the form of droplets.

(d) A plant in which the stomata are sunken.

(e) The apparatus to record the rate of transpiration in a cut shoot.

(f) Any two parts of a leaf which allow transpiration.

(g) The structure in a leaf that allows guttation.

(h) Loss of water as droplets from the margins of certain leaves.

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