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icang [17]
3 years ago
12

Why does geographic isolation cause speciation?

Biology
1 answer:
brilliants [131]3 years ago
6 0
It's "It prevents the two populations from interbreeding" I just took the test.
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What needs to happen to DNA for cells to divide
torisob [31]

Answer:

each new cell needs a DNA copy, which serves as instructions on how to function as a cell. DNA replicates before a cell divides. The replication process is semi-conservative, which means that when DNA creates a copy, half of the old strand is retained in the new strand to reduce the number of copy errors.

Explanation:

8 0
3 years ago
hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support
Gwar [14]

Hi,

Harshey and Chase did a great experimentation which was basically a two step experiment to prove that DNA and not proteins are the actual carriers of genetic information from parents to offspring.

  • In the first part of their experiment, they used bacteriophages (virus that eat bacteria). They used radioactively labeled sulphur(35S) medium to grow bacteriophages and observed that all the bacteriophages had proteins with radioactive sulphur(35S).
  • In the next step they allowed these phages to infect bacteria and to their surprise, they found that the bacteria did not had radioactively labeled sulphur in them because the coat of bacteriophage stays outside the body of bacteria when it attacks it. This proved that DNA not proteins were the hereditary material.
  • To make their results more reliable, they did a second experimentation in which, they marked the DNA of the phage with radioactive phosphorus 32P. After labeling DNA, they repeated the same experiment and this time, they found radioactive phosphorus inside the bacteria.

<em>This meant that the bacteria had DNA of phage entered inside them and this again proved that DNA not proteins are the hereditary material. You can see attached image for better understanding. </em>

Hope it help!


7 0
3 years ago
Osmosis describes the movement of water across a biological membrane and down its concentration gradient. In chemiosmosis, usefu
Vanyuwa [196]

Answer:

B)protons, down

Explanation:

Chemiosmosis is the diffusion of ions through a selective permeable membrane. It specifically refers to the production of ATP through the movement of hydrogen ions through an inner membrane during cellular respiration. Hydrogen ions diffuse from an area of ​​high proton concentration to one of lower concentration.

3 0
2 years ago
Benedict's solution is added to maple syrup and heated. The color changes from blue to orange. Based on this result, what biolog
borishaifa [10]

The Benedict's solution or the Fehling's solution is a chemical solution with clear blue color, which is a combination of the sodium citrate, sodium carbonate, and cupric sulphate pentahydrate. The Benedict's solution is used to test for the presence of the reducing sugars, such as glucose. When it is added into a solution and warmed, and it changes the color to orange, it confirms the presence of the reducing sugar in the testing solution.

Hence, the maple syrup contains reducing sugar.

7 0
3 years ago
How did Kepler develop his second law of motion?(1 point)
saw5 [17]

Answer:

He found that the planets do not all move at the same speed.  (A)

Explanation:

6 0
2 years ago
Read 2 more answers
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