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ArbitrLikvidat [17]
4 years ago
10

The epidermis consists of five layers of cells, each layer with a distinct role to play in the health, well-being, and functionin

g of the skin. Which of the following layers is responsible for cell division and replacement?
A) stratum basale
B) stratum granulosum
C) stratum lucidum
Biology
1 answer:
sdas [7]4 years ago
7 0

Answer:

A) stratum basale.

Explanation:

The epidermal layer consists of five layers. This is not having any blood vessels and known as avascular. The four-layer starting from stratum basale to stratum corneum is referred to as thin skin. But the skins of foot and palm has another layer called stratum lucidum. This layer forms the five layers of the epidermis.

The stratum basale is the deep layer of the epidermis. Below this layer dermis is present. This layer consists of basal cells which are precursors of keratinocyte cells. The stratum basale is a single layer cell and it undergoes continual mitosis. So that this cell produces new cells and these new cells replace the other older cells above it.  

As the basal cells are precursors of keratinocytes, they produce all keratinocytes of the epidermis.  

Two other types of cells are produced from this layer - Merkel cell, and melanocyte. Merkel cells act as touch receptors and melanocytes produce melanin pigments.

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(c) Name all the classes of Chordata which is warm-blooded (endothermic).
ddd [48]

The classes of chordata which are warm-blooded are birds and mammals.

Explanation:

Warm-blooded animals are those which can maintain their body temperature at a constant.  

These classes of chordates balance their internal body temperature with that of the outer environment. When the outer environment is cold, they increase their internal temperature by producing more heat; and when it is hot outside they reduce their internal temperature by cooling themselves.  

The food consumed by a warm-blooded animal fuels to maintain a constant body temperature and hence they require more food.  

Warm blooded animals cool themselves with the help of sweat glands.  

The skin and other parts like fur in birds help to keep the animals warm during winter. Birds also shed their fur in hot season to keep them light. Birds migrate to warm regions during winter.

These animals have high stamina and energy to survive environmental changes. They maintain their temperature through endothermy, homeothermy or tachymetabolism.

Whale living in water is the fish which is also warm blooded because it is a mammal.

4 0
3 years ago
In what part of the cell cycle does chromatin condense and form sister chromatids?​
Gnoma [55]

Answer:

prophase cells, ( ^_^ ) /

Explanation:

" parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. "

5 0
3 years ago
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Which of the following occurs when organisms interact with other living things and their inviroment?
malfutka [58]
The answer is Ecology.
7 0
3 years ago
Please don’t respond if you don’t know the answer and links will be reported
babunello [35]

Answer:

THE ANSWER IS PLANT CELLS!!!

Explanation:

please give brainlest and points for this correct answer

6 0
3 years ago
From what source do cells get their food
Bas_tet [7]

Answer:

Beginning with energy sources obtained from their environment in the form of sunlight and organic food molecules, eukaryotic cells make energy-rich molecules

Explanation:

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