EVERYDAY SCIENCE

SCIENCE

PLANT KINGDOM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Leaves found on many plants, such as magnolias, have thick waxy layers found on the outside. What is the purpose of this adaptation?
A
Prevent oxygen loss
B
Prevent water loss
C
Helps plants absorb sunlight
D
Prevents plants from being eaten
Explanation: 

Detailed explanation-1: -It is made up of cutin which is secreted by the epidermis of the leaf. A primary function of the waxy cuticle is to reduce water loss through the surface of the leaves, which is particularly important in water deficient areas like deserts which receives very little rainfall.

Detailed explanation-2: -Leaves are covered by a waxy cuticle on the outer surface that prevents the loss of water. Plants that grow in dry environments and plants that grow on other plants (epiphytes) have a much thicker waxy cuticle than those growing in more moderate, well-watered environments (Figure 17.1.

Detailed explanation-3: -Thick, waxy cuticle – having leaves covered by a thickened cuticle prevents water loss from the leaf surface. Stomata in pits – having stomata in pits, surrounded by hairs, traps water vapour and hence reduces transpiration.

Detailed explanation-4: -A waxy layer known as the cuticle covers the leaves of all plant species. The cuticle reduces the rate of water loss from the leaf surface. Other leaves may have small hairs (trichomes) on the leaf surface.

Detailed explanation-5: -Modification leaves into spines. Presence of thick cuticle. Sunken stomata. 03-Jul-2022

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