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pashok25 [27]
3 years ago
9

Living cells are classed as either prokaryotic or eukaryotic. Which of the following characteristic(s) identify both cell types,

eukaryotic cells and prokaryotic cells? Select all that apply. have a nucleus contain cytoplasm comprise most multi-celled organisms mostly single-celled organisms have membrane-bound organelles are the smallest unit of living matter are produced by division of another cell contain DNA
Biology
1 answer:
Alex3 years ago
4 0

Answer:

have a nucleus - Eukaryotic

contain cytoplasm - Both

comprise most multi-celled organisms - Eukaryotic

mostly single-celled organisms - Prokaryotic

have membrane-bound organelles - Eukaryotic

are the smallest unit of living matter - Both

are produced by division of another cell - Both

contain DNA - Both

Explanation:

1. Eukaryotic cells are cells that possess a membrane-bound nucleus that houses their genetic material.

2. Both eukaryotic and prokaryotic cells have a cytoplasm, which is the gelatinous substance where all other organelles and substances are found.

3. Most multicellular organisms comprises of eukaryotic cells.

4. On the other hand, most single celled organism, are Prokaryotic.

5. Eukaryotic cells, in addition to the possession of a membrane-bound nucleus, they also possess membrane-bound organelles e.g mitochondria, endoplasm reticulum.

6. Cells, generally, are the smallest unit of living matter. This comprises of both eukaryotic and prokaryotic cells.

7. Likewise, all cells arose from already preexisting cells according to the cell theory. Therefore, both eukaryotic and prokaryotic cells are made by the division of another cell.

8. Both prokaryotic and eukaryotic cells have a genetic material like DNA where they store genetic information.

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You have a population in hardy-weinberg equilibrium for the m and n alleles. These alleles are codominant. The allele frequency
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You have a population in hardy-Weinberg equilibrium for the m and n alleles. These alleles are codominant.  Allele frequency of m is 0. 4. 0.48 is the frequency of heterozygotes in the population.

An allele frequency has been computed by dividing the total quantity of copies of each of the alleles at that specific genetic location in the population by the number of points of time the allele of interest has been observed in a population.

The frequency of each genotype is typically calculated by dividing the population's total count of individuals by the number of people who have that genotype.

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1 year ago
Select all that apply.
Tom [10]
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5 0
3 years ago
A hummingbird may need to consume up to 50% of its body weight in sugar each day, just to meet its energy needs. Some of this en
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Answer:

A

Explanation:

3 0
2 years ago
Read 2 more answers
Which model of replication did the actual results of the Meselson-Stahl experiment support? Explain your answer.
AfilCa [17]

Answer:

Semi-conservative replication

Explanation:

After the double-helix discovery of Watson and Crick, there were three possible models about the DNI replication:

  • The Conservative model stated that the two strands of DNI together were the template of another new molecule. The final product was the original double-stranded molecule and the new molecule.
  • The semi-conservative model stated that the original DNI molecule separated into two strands, and each of them served as a template for the synthesis of a new complementary strand. The replication product would be two double-stranded DNA molecules, each carrying an original strand a new one.
  • The Dispersive moles stated that the replication product would be two molecules made by a mixture of segments of the original and the new molecules.

Meselson and Stahl joined to discover which of the models was the correct one. To do it they used E. coli and Nitrogen isotopes.

  • First, they extracted DNI from bacteria grown in a medium with N¹⁴ and got its density band by centrifugation.
  • Then they grew bacteria in a medium with N¹⁵, extracted their DNI molecules, centrifugated them, and got the density band, which was heavier than the firsts ones.
  • The researchers then transferred bacteria grown in medium with N¹⁵  to a medium with N¹⁴, and they allowed only one replication process to occur. DNI was extracted and centrifugated again, and a new band appeared. This band was an intermediate form between bands of DNI-N¹⁵ and DNI-N¹⁴.

This event <em>eliminated the conservative model</em>. If this model were correct, the expected result would be to get two bands: one corresponding to the density DNI-N¹⁵ and the other corresponding to the density DNI-N¹⁴.

  • Bacteria grown in a medium with N¹⁵ and then transferred to a medium with N¹⁴ were finally allowed to replicate twice. Their DNI was extracted and centrifugated. The result was two bands: one of them coincided with the intermediate band, and the other one with the DNI-N¹⁴.

<u>This result was conclusive</u> because if the dispersal model were correct, these two bands should not appear, as all the DNI strands would have part of the original molecule.

With this experiment, Meselson and Stahl proved that the correct replication model was the semi-conservative one.

5 0
3 years ago
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