They live in very hot climates, and so there is a lack of water around.
Therefore, they need to retain as much water as possible to help them stay alive.
The waxy layer helps reduce water loss from the cacti.
the cactus plant has got thick waxy layer to reduce transpiration and loss of moisture
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
To restrict the evaporation of water from their free surface.
So they can retain as much water as possible in a dry environment. The waxy coating helps to avoid too much water loss.
to help stop evaporation
To help the cactus conserve water.
by honey
A
Cactus get by in deserts because of following variations: It has a level green stem to store water and plan food by photosynthesis. The stem is likewise covered with a thick waxy layer, which assists with holding water. Its underlying foundations dive deep into the dirt for engrossing water. Passes on transform into spines to forestall loss of water.
A cactus that stores water in its stem is called a stem succulent. The stem has tissues that are capable storing large quantities of water. The stem also has a thick waterproof epidermis covered by a waxy cuticle that prevents loss of water due by evaporation. Examples of stem succulents - Cardon Cactus, Organ Pipe Cactus, Saguaro Cactus
the waxy layer is thinner than the epidermis
Assuming you mean in plant life, it prevents dehydration through evaporation
Waxy layer on outer surface of green plants is called cuticle .This cuticle is actually present in outer cell walls of epidermal cells . The wax present in cuticle is a type of lipid . It is waterproof layer which prevents excessive loss of water by transpiration . It also protects plant from abrasive damage. Wax is chemically a mixture of esters of long chain fatty acids eg cerotic acid , montanic acid , long chain alkanes , alcohols , ketones .
Cactus have a waxy layer on them to prevent water loss and reduce transpiration
protective
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.
thick and waxy skin, spiky leaves, flexible stem and shallow roots.
A waxy stem helps a cactus survive by minimizing water loss. Water may be lost through evaporation under high heat or transpiration. A cactus' thickened stem decreases water loss and disperses harsh sunlight, be the surface glossy, leathery or waxy. The texture makes it difficult for water to enter through or escape from the stem. It also makes it difficult for the sun to burn or scorch the plant's surface.
Cactus get by in deserts because of following variations: It has a level green stem to store water and plan food by photosynthesis. The stem is likewise covered with a thick waxy layer, which assists with holding water. Its underlying foundations dive deep into the dirt for engrossing water. Passes on transform into spines to forestall loss of water.
A cactus' waxy skin helps it retain moisture in desert climates.
A cactus that stores water in its stem is called a stem succulent. The stem has tissues that are capable storing large quantities of water. The stem also has a thick waterproof epidermis covered by a waxy cuticle that prevents loss of water due by evaporation. Examples of stem succulents - Cardon Cactus, Organ Pipe Cactus, Saguaro Cactus
A waxy coating
Chlorophyll gives cactus stems their green color. A cactus has chlorophyll because of the stem's photosynthetic interaction with sunlight to make cactus foods. In many other plants, photosynthesis takes place in the leaves. But cactus needles don't offer a large enough surface for photosynthesis to take place or for photosynthetic byproducts to be stored. Instead, needles have reduced surface areas to stop surface evaporation of moisture. So photosynthesis instead must take place within the larger surface area of the stem.
the waxy layer is thinner than the epidermis
cactus have a hollow stem. it is where they store water and food for survival