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xz_007 [3.2K]
3 years ago
10

What scientist studied how wounds heal and proposed that cells come from preexisting cells

Biology
2 answers:
Sloan [31]3 years ago
7 0

Answer:

Rudolf Virchow

Explanation:

Apex

DochEvi [55]3 years ago
4 0

Answer:

Rudolf Virchow

Explanation:

During his studies on inflammatory exudates, Rudolf Virchow observed that the increased number of cells in the exudates was due to the formation of new cells by pre-existing cells. He also studied that the formation of new cells from the preexisting cells is responsible for wound healing and for normal growth and development of living beings.

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In the Hershey-Chase experiment, bacteriophages were produced in either 32P-containing or 35S-containing medium. Where were thes
ikadub [295]

Answer:

E. The 32P was associated with the bacterial cells and 35S was associated with the phage particles.

Explanation:

Hershey and Chase's experiment proved that DNA serves as the genetic material of the cell.

This experiment used the bacteriophage which could infect the bacteria by integrating its DNA into the bacterial genome. For this, he used radioactive phosphorus and radioactive sulphur.

Phosphorus is a constituent of the DNA and sulphur is the constituent of the proteins. This means if the DNA is transferred, then radioactive Phosphorus will be transferred but if proteins are transferred then radioactive sulphur is transferred.

He found the radioactive phosphorus attached to the bacteria and sulphur to the phage itself. This suggested that the DNA material is transferred and acts a hereditary material and not the protein.

Thus, Option-E is correct.

6 0
3 years ago
Wha did the yellow ball in the center of the model represent
igomit [66]
I guess it would be the sun?
5 0
3 years ago
Read 2 more answers
A population of Muscovy ducks contains 13 birds with black masks and 37 birds with red masks. Red masks are the dominant trait.
Semmy [17]

Answer: Black allele has frequency of 0.14.

              Red allele has frequency of 0.86.

             The frequency of heterozygotes is 0.241

Explanation: <em>Hardy-Weinberg model </em>states the frequency of alleles in a population will stay in equilibrium as long as there are external influences. It is also used to determine alleles frequencies using the following equations:

p+q=1

p^{2}+2pq+q^{2}=1

p represents frequency of dominant allele;

q represents frequency of recessive allele;

2pq is frequency of heterozygotes;

For the frequency of red allele, which is dominant, we can use:

p^{2}=\frac{37}{13+37}

p^{2}=\frac{37}{50}

p^{2}=0.74

p=\sqrt{0.74}

p = 0.86

For the black allele:

p+q=1

q=1-p

q=1-0.86

q = 0.14

Frequency of heterozygotes is

2pq = 2(0.86)(0.14)

2pq = 0.241

<u>Frequencies for a population of Muscovy ducks are </u><u>0.86 for red allele, 0.14 for black allele and 0.241 for heterozygote.</u>

5 0
3 years ago
5. Which of the following is the best organism to have in your compost pile?
lesya [120]

Answer:

Worms!

Explanation:

7 0
3 years ago
Will give brainliest
borishaifa [10]

Answer:

I believe its D...

Explanation:

Hope this is helpful :)

3 0
3 years ago
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