ANIMAL PHYSIOLOGY
OSMOREGULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Waxy cuticles designed to repel water
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Pneumatophores or ‘breathing roots’ that protrude form the surface of the ground
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Stomata that are present in high numbers
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An outer surface covered in fine hairs
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Detailed explanation-1: -Xerophytes such as cacti are capable of withstanding extended periods of dry conditions as they have deep-spreading roots and capacity to store water. Their waxy, thorny leaves prevent loss of moisture. Even their fleshy stems can store water.
Detailed explanation-2: -Xerophyte adaptations increase water intake, limit water loss, and store water efficiently. Water intake adaptations include deep or widespread roots, and high salt content to increase osmosis. Xerophytes have thick cuticles, lost or finely divided leaves, reduced stomata, and CAM photosynthesis.
Detailed explanation-3: -A xerophyte is a plant species that have adaptations to live in a desert or ice-covered or snow-covered area in the Alps or the Arctic, in a climate with little liquid water. Cacti, pineapple and some gymnosperm plants are common examples of xerophytes.