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natka813 [3]
3 years ago
13

Where do scientists obtain adult stem cells?

Biology
1 answer:
mixer [17]3 years ago
6 0

Answer:

b. skin

Explanation:

but I've also heard it. can be in brain blood teeth

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_____ provides a mechanism by which the chromosome number may be kept the same from one generation to another. Mitosis Meiosis N
Setler [38]
Answer: mitosis.

During DNA replication a pair of chromosomes of from one cell genders two duplicated chromosomes (so the number of chromosomes is duplicated), then in the mitosis process the cell split into two identical cells each with half of the duplicated chromosomes, so at the end one cell with two chromosomes form two cells each with two chromosomes. So, the new generation of cells has the same number of chromosomes.
5 0
3 years ago
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explain how an enzyme works using the terms catalyst, enzyme, active site, substrate, and product please.
dusya [7]

Answer: The enzyme or the Catalyst works by combining with its substrate in the activation site and converts it to Products.

5 0
2 years ago
An organism's genome is analyzed and found to contain 18% guanine. What percentage of that organism's DNA is adenine?
Oxana [17]

Answer:

32%

Explanation:

According to Chargaff in his complementary base pairing rule, he stated that the proportion of purine and pyrimidine bases is equal to 100%

That is, A + T + G + C = 100%

Where A=T and G=C i.e the proportion of each base pair is equal.

Hence, if the Guanine content is 18%, it means the Cytosine content of that DNA molecule must also be 18%. Therefore:

18 + 18 + A + T = 100

A + T = 100 - 36

A + T = 64

If the sum proportion of Adenine and Thymine is 64% and each must contain equal proportions, A or T = 64/2 = 32

Hence, Adenine contains 32%, likewise Thymine.

6 0
3 years ago
Hardwoods come from what kind of trees?
Iteru [2.4K]
A might be it not to sure sorry
4 0
3 years ago
The four eukaryotic kingdoms of life are listed here. Each kingdom has unique characteristics.
myrzilka [38]

Answer:

Protista

Fungi:

Plantae : Plant-like Multicellular Autotroph

Animalia: Animal Like, multicellular- heterotroph

Explanation:

3 0
3 years ago
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