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Answered 2010-01-11 23:30:53

A thick waxy coating on any part of a plant is usually there to control the evaporation of water.

It is also useful in warding off insects and diseases

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Edwin Escobar-Orrego
Answered 2020-11-18 23:41:30

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To keep it warm at night because its COLD in the desert!.


Cacti store water in their "leaves". Because they naturally grow in areas that don't get a lot of rain, they need to be able to store what little water they get. Their skins are thick, to help them better retain the moisture that they are storing.


Leaves of aquatic plants are usually thick and fleshy. Some have a thick waxy coating on the surface of their leaves , eg. water lilies.


A cactus is designed to conserve and retain water. Very little water evaporates from a cactus, and it has thick leaves and a thick inner trunk that are able to store lots of water.


The stem which is the thick part of the cactus plant stores food.:)


Because the thick waxy bark prevents the loss of moisture so it stops the plant dying of thirst


cuticle coating on leaves and thick epidermal cell walls


the water is stored in the center of a plant a thick waterproof,waxy coating helps stop the water loss


Cacti have a thick and succulent stem because the rainwater is stored in the stem. A thick coating also holds the water inside the cactus and prevents it from evaporating.


Cactus are well adapted to deserts because their thick leaves contains lot of water so they don't die.


the cactus includes small and spiky leaves that reduce evaporation of water. It also prevents loss of water. The cactus has also a thick and juicy stem that stores water.


cactus stems carry out photosynthesis and store water. Unlike many other succulents, the stem is the only part of a true cactus where this takes place. Much like many other plants that have waxy coatings on their leaves, Cacti often have a waxy coating on their stems to prevent water loss. This works by preventing water from spreading on the surface and allowing water to trickle down the stem to be absorbed by the roots and used for photosynthesis. Cacti have a thick, hard-walled, succulent stem - when it rains, water is stored in the stem. The stems are photosynthetic, green, and fleshy. The inside of the stem is either spongy or hollow (depending on the cactus). A thick, waxy coating keeps the water inside the cactus from evaporating.


The roots to a cactus are long thick and go very wide and deep. When it rains the roots absorb the water and store it in its leaves. The cactus doesnt need a lot of water. A couple drops a year will keep it alive. Its leaves are protected with spines.


They are succulent plants, having thick fleshy leaves or stems to store water


thick and waxy skin, spiky leaves, flexible stem and shallow roots.


Enlarged stems carry out photosynthesis and store water. Unlike many other succulents, the stem is the only part of a true cactus where this takes place. Much like many other plants that have waxy coatings on their leaves, Cacti often have a waxy coating on their stems to prevent water loss. This works by preventing water from spreading on the surface and allowing water to trickle down the stem to be absorbed by the roots and used for photosynthesis. Cacti have a thick, hard-walled, succulent stem - when it rains, water is stored in the stem. The stems are photosynthetic, green, and fleshy. The inside of the stem is either spongy or hollow (depending on the cactus). A thick, waxy coating keeps the water inside the cactus from evaporating.


The cactus adapted to its harsh environment by developing thick skin to slow the evaporation of water. The leaves changed in order to reduce the surface area that water could evaporate from and over time became defensive spines to protect itself from animals trying to get inside its thick skin for the moisture. The cactus makes its food, by having chlorophyll throughout the rest of plant. That is why the entire cactus is green.


Cactus plants stop water loss mainly by modified leaves and thick stems. They have leaves in the form of thorns, spines, quills, prongs, needles or bristles. Such modified leaves have smaller surfaces from which water can evaporate. Additionally, the stomata or breathing pores are found on the cactus stem instead of the typical herbaceous location of the leaf surface. The outer skin of the cactus stem is thick and thereby prevents the escape of the water supplies inside the interior tissue.


Cactus stems are very thick because they store water.


Fleshy leaves and thick surface layers help in keeping water inside the plant, preventing it from drying out. The cactus is an extreme example of this adaptation, made to survive in arid environments.


Plants have a thick waxy coating to prevent themselves from heat and to store a lot of water.This coating is also called cuticle.


the cactus plant has got thick waxy layer to reduce transpiration and loss of moisture


Plants in deserts have thick waxy coating to reduce loss og water from the plant.


The thick stem of a cactus holds water.


Cactus plants have thick fleshly stems.They look like thick leaves but instead they are modified stems.They can store water for long dry weather.Their green colour shows the presence of chlorophyll,an essential input for photosynthesis.



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