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because cuticle is waxy layer
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∙ 12y ago
Mishkat Hafia
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What is the skin on a leaf called?
The outer layer of a leaf's skin is called the waxy cuticle, or just cuticle. You could also include the next layer, the epidermis layer. Mostly, though, the leaf's skin is called the 'Leaf surface'.
The outermost single layer of a cell that overlap one another like shingles in a hair?
the cuticle
What is the waxy covering of a leaf?
cuticle
Why do so many plants like the aloe have waxy surfaces?
because it is the cuticle
What is the outer covering on a spider's body called?
The spiders outer covering is an exoskeleton. It is made of a substance called chitin. there are layers of this substance with four strucural regions: epicuticle, procuticle, epidermis and basement membrane. Of these the epicuticle is a multi-layered external barrier that, especially in terrestrial arthropods, acts as a barrier against dessiccation. The strength of the exoskeleton is provided by the underlying procuticle, which is in turn secreted by the epidermis. Arthropod cuticle is a biological composite material, consisting of two main portions: fibrous chains of alpha-chitin within a matrix of silk-like and globular proteins, of which the most well-known is the rubbery protein called resilin. The relative abundance of these two main components varies from approximately 50/50 to 80/20 chitin protein, with softer parts of the exoskeleton having a higher proportion of chitin. Although the cuticle is relatively soft when first secreted, it soon hardens in a poorly-understood process that involves dehydration and/or tanning mediated by hydrophobic chemicals called phenolics. Different types of interaction between the proteins and chitin leads to varying mechanical properties of the exoskeleton.In addition to the chitino-proteinaceous composite of the cuticle, many crustaceans, some myriapods and the extinct trilobites further impregnate the cuticle with mineral salts, above all calcium carbonate, which can make up up to 40% of the cuticle. This can lead to great mechanical strength.The two layers of the cuticle have different properties. The outer, scleretosed layer is very strong under compressive forces, but much weaker under tension.[2] When it fails, it does so by cracking.[2] The inner layer is not scleritosed, and is thus much softer; it is able to resist tensile forces but is liable to failure under compression.[2]This combination is especially effective in resisting predation, as predators tend to exert compression on the outer layer, and tension on the inner.[2]The degree of scleritisation affects how the cuticle responds to deformation. Below a certain point - and this point will be higher the more scleritised the cuticle is - deformation is elastic and the original shape is returned to after the stress is removed. Above this point, plastic (non-reversible) deformation occurs until finally the cuticle cracksThe arthropod exoskeleton is typically divided into different functional units to allow flexibility in an often otherwise rigid structure. For example, the head is a fused capsule; and the trunk is often divided into a series of articulating sclerites called tergites. In addition, the characteristic limbs of arthropods need to be jointed. The internal surface of the exoskeleton is often elaborated into a set of specialised structures called apodemes that allow the attachment of muscles. Such endoskeletal components of the arthropod skeleton can be highly complex, as in crabs and lobsters.The relative rigidity of the exoskeleton means that continuous growth of arthropods is not possible. Therefore, growth is periodic and concentrated into a period of time when the exoskeleton is shed, called moulting or ecdysis, which is under the control of a hormone called ecdysone. Moulting is a complex process that is invariably dangerous for the arthropod involved. Before the old exoskeleton is shed, the cuticle separates from the epidermis through a process called apolysis. New cuticle is excreted by the underlying epidermis, and mineral salts are usually withdrawn from the old cuticle for re-use. After the old cuticle is shed, the arthropod typically pumps up its body (for example, by air or water intake) to allow the new cuticle to expand to a larger size: the process of hardening by dehydration of the cuticle then takes place. Newly molted arthropods typically appear pale or white, and darken as the cuticle hardens.
What is the outer layer of the hair shaft called?
The outer layer is the cuticle.
What is the single layer cells beneath the cuticle?
a single layer of cells beneath the cuticle
What is the single layer of cells beneath the cuticle?
a single layer of cells beneath the cuticle
Is the lower epidermal layer cover by the cuticle?
Yes the lower eqidermal layer is corvered with cuticle.
The surface of a vascular plant is covered by a waxy waterproof layer called?
The cuticle I think
Which part of the leaf protects the mesophyll layer?
cuticle layer
What is the layers of the skin is the outer layer?
The cuticle
What is the outside protective layer of the hair?
It is the cuticle.
What is the outer layer of the vein in a plant?
cuticle
The cuticle in plants?
The cuticle is the waxy waterproof layer on the leaves (it is thicker on the top, but there is also a thin layer underneath the leave), which prevents excessive water loss.
What is the waxy coating on the surfaces of plants?
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 .
What is the purpose of the cuticle of plants?
The waxy layer, or cuticle, on a leaf is designed to minimize water loss by evaporation.
