Question

Xerophytic characters

of pinus leafa

Answer 1

Answer:

The stomata are sunken into the needle, the needles have a thick, waxy cuticle, and the cylindrical structure gives it a lower surface area for the volume. All these will reduce water loss by transpiration from the leaves.

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Answer 2

Explanation:

Xerophytic adaptations are

morphological and physiological

characteristics that enable an organism

to survive under conditions of water

deficit.

Conifers possess many adaptations

that enable them to conserve water.

The following are examples of

adaptations that conifer leaves possess

which serve to prevent water loss:

Thick cuticle

Sunken stomata

Hypodermis

Needle-like leaves

The cuticle is thick and it is

composed of a waxy substance that

prevents water loss through the

epidermis. Sunken stomata serve to

prevent water loss by increasing the

relative humidity in the vicinity of each

stoma. The hypodermis is composed

of thick-walled cells that are compactly

arranged beneath the epidermal layer.

These cells hinder the passage of

water into the epidermal layer. The

needle-like leaves reduce the surface

area from which water can evaporate.

Below is a labeled cross section

(100x) of a pine needle (Pinus sp.). The

stated characteristics are

demonstrated, as well as some

additional features.