3.4 Process of transpiration

Question 1

Process of transpiration

Answer 1

water loss in form of water vapour from surface of leaves to the air through evaporation

Question 2

Epidermis of a leaf is made up of

Answer 2

single layer of epidermal cell covering both the upper and lower surface of leaf

Question 3

Name of upper and lower surface of leaf?

Answer 3

Upper epidermis and lower epidermis

Question 4

Exudation or guttation is

Answer 4

water loss from plants in liquid form through hydathodes that are open at the edge of the leaves

Question 5

When does guttation usually occur ?

Answer 5

at night or when air humidity is high

Question 6

What is the rate of transpiration

Answer 6

temperature
light intensity
air humidity
movement of air

Question 7

Function of xylem

Answer 7

transport water and dissolved mineral salts from the roots to the leaves through the stem to carry out photosynthesis and to replace water lost during transpiration

Question 8

Function of phloem

Answer 8

transports sucrose produced by leaves during photosynthesis to other parts of the plant