SSC MTS EXAM

SSC

BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is an adaptation of a xerophyte?
A
reduced roots
B
hairy leaves
C
many stomata
D
thin cuticle
Explanation: 

Detailed explanation-1: -Xerophytes such as cactus are capable of withstanding extreme conditions of dry periods as they have deep-spreading roots and the capacity to store water is quite remarkable. The leaves have adapted accordingly and they are waxy and thorny that prevents loss of water.

Detailed explanation-2: -In the xerophytic plants, the sunken stomata are present. These stomata open during the night to prevent water loss. To adapt to this environment the xerophytic plant leaves reduce into spines, which reduces the surface area of the leaf and also reduces the amount of transpiration.

Detailed explanation-3: -Reduced leaves: Xerophytes often have small, reduced leaves that minimize water loss through transpiration. Waxy or hairy surfaces: Some Xerophytes have waxy or hairy surfaces that reduce water loss by limiting the amount of air that comes into contact with the plant’s surface.

Detailed explanation-4: -Some xerophytes have tiny hair on their surfaces to provide a wind break and reduce air flow, thereby reducing the rate of evaporation. When a plant surface is covered with tiny hair, it is called tomentose. Stomata is located in these hair or in pits to reduce their exposure to wind.

There is 1 question to complete.