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tatyana61 [14]
3 years ago
13

Some differentiated cells retain the ability to proliferate as needed to repair damaged tissue throughout the life of the organi

sm. Which of the following cell types do not retain this unique ability? a. Fibroblasts b. Neurons c. Endothelial cells
Biology
2 answers:
galben [10]3 years ago
8 0

Answer: The answer is B- Neurons

Explanation:

Neurons are nerve cells whih are fun units of br nervous system. They are desig to transmit inform to other nerve cells, muscles or glands. They do this by rece sensory input from external forces, send motor commands to muscles, glands or other neurons. They transform and relay electrical signal.

Unlike other cell types they cannot proliferate once they are differentiated. They are non-dividing cells.

Sindrei [870]3 years ago
3 0

Answer:

Neurons

Explanation:

Fibroblast:

Fibroblasts are connective tissue in animals.These are the type of cells that has the ability to synthesizes the extracellular matrix and collagen. These cells have role in wound healing by  producing the structural framework for animal tissues.

Neurons:

Neurons are the fundamental structural and functional units of the brain and nervous system. These cells are responsible for receiving sensory information from the external environment, process it and sending commands to our muscles via motor neurons. These cells after maturation loss the ability to proliferate and hence not able to repair successfully.

Endothelium Cells:

These are the cells that are present inside surface of blood vessels and lymphatic vessels. It is a thin layer of simple, or single-layered, squamous cells called endothelial cells. These cells have the ability to divide and repair its damage cells by replacing them with new ones.

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In samples of DNA isolated from two unidentified species in bacteria, X and Y adenine makes up 32% and 17%, respectively, of the
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Answer:

On the basis of Chargaff's rule, in a double-helical DNA, A = T and G = C (Here A means adenine, T means thymine, G means guanine, and C means cytosine. For X, A is given 32%, therefore, T must be 32%, and the leftover 36% is to be distributed equally between G and C. Thus, G = C = 18% each.  

The assumption formed is that the DNA is a double-stranded structure. The species that exhibits higher G + C content in the molecule of a DNA is steadier at higher temperatures as it melts at high temperature. The species Y, which exhibits G + C in total as 66% is the thermophilic bacterium between the two.  

7 0
3 years ago
Identify the functions of the brain.
alexdok [17]

Answer:

1) thalamus

2) cerebrum

3) hypothalamus

Hope this helps

5 0
3 years ago
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In an element's square on the periodic table, the number with the greatest numerical value represents the
Goshia [24]

In the square of an element on the periodic table, the number with the highest numerical value represents the atomic number.

  • atomic number.

<h3>What is the atomic number Z?</h3>

The atomic number is represented by the letter Z and indicates the number of protons (p) in the nucleus of the atom. This quantity is characteristic of each chemical element.

With this information, we can conclude that The atomic number, represented by the capital letter Z, corresponds to the number of protons in the nucleus of atoms (Z = p).

Learn more about atomic number in brainly.com/question/8834373

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3 0
2 years ago
Lancelets and tunicates are two groups of chordates. classify each statement as applying to lancelets, tunicates, both lancelets
Alenkinab [10]
Characteristics of Lancelets:
Small
Elongated
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Lacks a jaw
No sense organs
Has a notochord
Example: Lamprey

Characteristics of Tunicates:
Marine invertebrate
Has an outer coat that is rubbery or hard
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Examples: sea squirts, salps

I hope this is the answer that you were looking for.
7 0
3 years ago
At the end of winter, water containing very high concentrations of road salt used to deice roadways runs off and some of it ente
jeka94

Answer:

D

Explanation:

The water molecules in the cell will want to move out of the cell into the pond in attempt to lower the salt concentration which will cause the cells to shrivel up with the loss of water. This is also called becoming hypertonic.

8 0
2 years ago
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