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Andrei [34K]
3 years ago
9

You learn that a Mars lander has retrieved a bacterial sample from the polar ice caps. You obtain a sample of this bacteria and

perform the same kind of experiment that Meselson and Stahl did to determine how the Mars bacteria replicates its DNA. Based on the following equilibrium centrifugation results, what type of replication would you propose for this new bacteria?
Biology
1 answer:
zmey [24]3 years ago
8 0

Answer:

The list of options to complete the question are

a. conservative replication

b. semi conservative replication.

c. dispersive replication

d. discontinuous replication

e. continuous replication

THE ANSWER IS C.

c. dispersive replication

Explanation:

In this type of DNA replication, the original DNA chain is broken down and combined randomly before the

unwinding of the double helix structure and separation to form a template for synthesis of messenger RNA

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grigory [225]
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4 0
3 years ago
"in order for the stain to penetrate the impervious coat of the spore, which primary stain is steamed into the cell surface?"
lana66690 [7]

Answer;

-Malachite green

Explanation;

-Malachite green is also used in endospore staining, since it can directly stain endospores within bacterial cells; here a safranin counterstain is often used.

-Because of their tough protein coats made of keratin, spores are highly resistant to normal staining procedures. The primary stain in the endospore stain procedure, malachite green, is driven into the cells with heat.

7 0
3 years ago
Two genes, A and B, are located 30 map units apart. A mating between an individual homozygous dominant for both traits and one h
Westkost [7]

Answer:

35%

Explanation:

If two genes are 30 map units apart, 30% of the produced gametes will be recombinant.

A mating between an individual homozygous dominant for both traits (AB/AB) and one homozygous recessive for both traits (ab/ab) is conducted.

The F1 will be heterozygous for both genes: AB/ab.

The F1 progeny is then test-crossed to a homozygous recessive individual:

<h3>AB/ab X ab/ab</h3>

<u>The possible offspring will be:</u>

  • Parental (70%): AB/ab and ab/ab
  • Recombinant (30%): Ab/ab and aB/ab

Since 30% of all the gametes produced by the F1 individual will be recombinant, 70% will be parental. As there are two types of parental gametes, each of them will have a frequency of 35%.

<u>The offspring that will have a dominant phenotype for both traits has the genotype AB/ab with a proportion of 35%.</u>

8 0
3 years ago
Duplication of a segment of a chromosome would result in _______. see section 16.4 (page 344) .
Svetlanka [38]
Duplications are repeated segments of genetic materials that result from unequal crossing over during meiosis or through a replication error prior to meiosis. They usually occur when homologous pairs do not line up correctly or in chromosomes with a lot of repeat sequences. Duplication of a segment of a chromosome would result in Genetic variability during evolution due to gene duplication. 
5 0
3 years ago
Which component of the blood is part of the body’s immune system?
VARVARA [1.3K]
The answer is D, white blood cells.

The main function of white blood cells is to defense the body from bacteria or other pathogens. There's 2 main kinds of white blood cells, lymphocytes and phagocytes. Lymphocytes mainly produce antibodies that can kill bacteria or any pathogens, and phagocytes can ingest the pathogens directly.

Therefore, since the white blood cells can protect our body, they're part of our immune system.
3 0
3 years ago
Read 2 more answers
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