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Ilya [14]
2 years ago
5

What are stem cells and how may they be used

Biology
2 answers:
mojhsa [17]2 years ago
5 0

Answer:

cells from which all other cells with specialized functions are generated.

Explanation:

they may be used by dividing into two or more cells called the daughter cells

o-na [289]2 years ago
4 0
Stem cells are cells with the potential to develop into many different types of cells in the body. They serve as a repair system for the body. There are two main types of stem cells: embryonic stem cells and adult stem cells.
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Sometimes a species' trait is not actually an adaptation because: it result from other properties hitchhiker effect it is an exa
Ivahew [28]

Answer:

hitchhiker effect

it is an exaptation

Explanation:

Adaptation is a property which occurs due to change in the environmental conditions of an organism. Some traits of organisms are not adaptation because sometimes the function of a trait changes due to evolution which we called exaptation. It also occurs due to hitchhiker effect, this effect occurs when the change occurs in the frequency of allele not due to natural selection but due to selective sweep with the nearby gene.

4 0
2 years ago
Who first suggested the theory of evolution by natural selection?
grin007 [14]

Answer:

Charles Darwin

Explanation:

Evolution theory is a shortened form of the term "theory of evolution by natural selection," which was proposed in the 19th century by Charles Darwin and Alfred Russel Wallace.

hope this helped!

3 0
3 years ago
Read 2 more answers
At first glance, fermentation of pyruvate to lactate appears to be an optional add-on reaction to glycolysis. After all, could c
Serhud [2]

Answer:

No, glycolysis can not be continued without fermentation in the absence of oxygen.

Explanation:

In the absence of oxygen, cells perform fermentation to oxidize NADH into NAD+. NAD+ is required during the conversion of glyceraldehyde 3 phosphate into 1,3 bisphosphoglycerate. Fermentation reduces pyruvate and oxidizes NADH so that the NAD+ supply is continued to ensure continuity of glycolysis.

If fermentation does not occur under anaerobic conditions, cells will accumulate pyruvate and NADH. Glycolysis could not be continued in the absence of NAD+.

8 0
3 years ago
Why might the knoblike proteins on the outer surface of hiv hold a key to the production of a vaccine against aids?
Nataly_w [17]

This is because the GP120 protein of the HIV virus that forms the ‘knob’ is essential for the infection of CD4 cells of the immune system by the virus. The glycoprotein is, therefore, a good target for vaccines especially since the molecule is highly conserved because most mutations in the region could be highly deleterious to the virus.






4 0
3 years ago
Suppose thymidine labeled with carbon-14 was added to a culture of bacteria and allowed to incubate for 20 minutes (one generati
Yanka [14]

Answer:

One strand of all the isolated DNA double helices would have C-14 labeled thymidine.

Explanation:

DNA replication is a semiconservative process which means that each newly formed DNA double helix contains one parental strand and one newly formed strand.

Since the medium has thymidine labeled with C-14, all the newly formed strands formed during DNA replication would have radio-labeled thymidine.

Therefore, by the end of 20 minutes, one out of two strands on each double helix would have labeled thymidine nucleotides.

3 0
3 years ago
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