Biology
Fill in the blanks:
(a) Transpiration is the loss of water as water …………… from the …………… parts of the plant.
(b) Closing of …………… and shedding of leaves reduce …………… .
(c) Transpiration helps in creating …………… force and in removing excess …………… .
Related Questions
Assertion. Transpiration helps in the descent of sap by producing a suction force acting from the top of a plant.
Reason. Transpiration is the evaporative loss of water through the aerial parts (leaves, stems) of a plant. However, this loss holds much significance for the plant.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
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.
(c) An instrument used to find the rate of transpiration.
(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.
Given below is an example of a certain structure and its special functional activity:
chloroplasts and photosynthesis
In a similar way, write the functional activity against each of the following:
(a) Hydathodes and ……………
(b) Leaf spines and ……………
(c) Lenticels and ……………
(d) Xylem and ……………
State whether the following statements are True (T) or False (F)? Rewrite the false statements in the correct form.
(i) Most transpiration occurs at midnight.
(ii) Transpiration creates a pull for the upward movement of the sap.
(iii) Wind velocity has an effect on transpiration.
(iv) Atmospheric humidity promotes transpiration from a green plant.
(v) Transpiration helps to cool the body of the plant.