A scientist investigated DNA replication in two groups of cells, labeled A and B. She injected radioactively labeled nucleotides into cells of each group and allowed DNA replication to begin. When replication was halfway completed, she injected a drug into the cells to stop replication. She then examined the cells to determine the distribution of the newly-synthesized DNA. She found each cell of group A had many segments of new DNA in its nucleus, while each cell of group B had a single segment of new DNA in its cytoplasm. What can the researcher conclude about the cells?

Answers

Answer 1

Answer:

Answer:

A is a eukaryotic cell while B is a prokaryotic cell

Explanation:

The researcher can conclude that cell A is eukaryotic while cell B is prokaryotic.

In eukaryotic cells, the DNA is located majorly in the nucleus and the replication of the DNA happens in the nucleus. Hence, it is only logical to find segments of new DNA in the nucleus of cell A during replication.

Prokaryotic cells, however, lack a nucleus. Their DNAs lie freely within the cytoplasm. This thus means that replication can only happen in the cytoplasm. Hence, it follows logically to find a new DNA segment in the cytoplasm of cell B.

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Please hurry!!!!!!!!!Which of the below examples is the best evidence that species adaptions to rocky shores need to be different than adaptations to sandy beaches?

A. Paddle crabs can very quickly burrow into the sand using their rear legs while still being able to use their paddles for swimming.

B. Certain mollusks are able to grind their shells to fit the contours of a nearby rock creating a suction effect.

C. Mud snails are able to suck in sand and excrete mud that helps nearby plants grow…and thus able to feed on them.

D. Marine bristleworms use their fine bristles for swimming and holding themselves in burrows while the tide is in.

Answers

Answer:

Explanation:

I gives you a better reason of why the species can adapt to their new environment in sandy beaches

The correct answer is C

If an organism’s diploid cells contain 8 chromosomes, how many chromosomes do its haploid cells contain?

Answers

it is 4 i got it right on flvs quiz

The haploid cell has 16 chromosomes

Which of the following is an example of an exothermic process?Melting

Boiling

Freezing

Evaporating

Answers

The answer to the question above is letter a. melting.

>Exothermic is the giving off heat energy the transfer of energy to the surroundings.

>In exothermic reaction, the energy is usually transferred as heat energy

> Other example of exothermic is combustion

A mixture of sand, silt and clay that forms a good farming soil is called ______.

Answers

a mixture of sand slit and clay that forms a good farming soil is called loam

In the diagram, AC¯¯¯¯¯ is a diameter of the circle with center O. If m∠ACB = 50°, solve for m∠BAC.A. 50°
B. 40°
C. 80°
D. 100°

Answers

Answer;

B. 40°

m∠BAC = 40°

Explanation;

In the question AC is the diameter of the circle.
ACB is a triangle with angles m∠BAC, m∠ACB and m∠ABC.
Angles subtended by a diameter to the circumference of a circle is always right angle or 90 degrees.
Therefore, angle m∠ABC, which is subtended by diameter AC to the circumference is 90 degrees.

But, angles in a triangle adds up to 180 degrees, therefore;

m∠BAC = 180 - (m∠ACB + m∠ABC)

= 180 - (50 + 90)

= 180 - 140

= 40°

Thus; m∠BAC = 40°

The solution of m∠BAC is mathematically given as

m∠BAC = 40°. This is further explained below.

What is angle

The angle formed by two crossing lines or surfaces, commonly expressed as a number of degrees.

What is the solution of m∠BAC?

Generally, the equation for angle m∠BAC is mathematically given as

m∠BAC = 180 - (m∠ACB + m∠ABC)

m∠BAC = 180 - (50 + 90)

m∠BAC = 40°

In conclusion, m∠BAC = 40°

Read more about angle

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In which type of reproduction can cells divide through the process of mitosis ?

Answers

Mitosis is carried out for growth and development processes. The cell divide and multiply for growing and removing the worn out cells/damaged cells. Two identical daughter cells are formed in mitosis. Errors in the same may cause genetic disorders, Sex cells divide by the process of meiosis.

asexual reproduction

this is the correct answer

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