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natima [27]
3 years ago
15

A scientist engineers a virus that contains the gene thought to provide bacterial resistance to the antibiotic vancomycin. The s

cientist then takes a culture of bacteria and divides it in two. One portion is allowed to incubate with the previously mentioned virus, while the other is not. Both bacterial cultures are then placed onto petri plates whose media contain vancomycin. Only the culture grown previously with viruses shows growth of bacterial colonies. How did these bacteria FIRST come to have resistance to this antibiotic? Selected Answer: Transformation Bifurcation Transduction Transformation Conjugation
Biology
1 answer:
ikadub [295]3 years ago
3 0

Answer:

Transduction

Explanation:

Bacteriophages (or phages) are viruses known for its ability to contaminate and become a parasite in a bacteria. These phages can pass its DNA from a single bacterium to another bacterium, via a means referred to as genetic transduction.

This is believed to be the centre route through which bacteria evolve and possess the antibiotic resistance and virulence factors that increases the formation of new and an increasingly more pathogenic strains.

The mechanisms of genetic transduction includes generalized and specialized transduction.

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Which phrases are true of only the mantle? Check all that apply.
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Answer:

i had to list all the facts cuz we didnt have a diagram

Explanation:

The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth's total volume.

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What does a pyramid of biomass represent ?
MArishka [77]

Answer:

Explanation:

i don't know but that sucks for you

7 0
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How does pioneer organisms modify the environment
frozen [14]

Answer:

Pioneer species/organisms help modify the environment because they are the first organism to live on that "terrain" or environment and they open up the chance to make more organism, also when they die and decompose they make more soil so that more organisms can grow.

Explanation:

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3 years ago
Explain how the ages of the rocks on the ocean floor support the theory of seafloor spreading​
Dafna11 [192]

The Drilling sample of the Seafloor spreading theory helped in determining rock ages on the floor of ocean.

Explanation:

The formation of crusts of ocean by the process of volcanic eruptions in the ridges of the middle ocean is the theory of seafloor spreading proposed by Hammond Hess. The movement of tectonic plates continuously forms sea floors through spreading of seafloor.  The several evidences in support of this theory has been seen, of which some are – molten material eruptions, magnetic stripes in rocks and rock ages.

The drilling evidence is the final one that was proved by taking samples of rock by drilling in ocean and by bringing them with pipes. The observation of these rocks proved that older rocks were collected from farther ridges and youngers are found in the central ridges.  

4 0
3 years ago
Tom has developed chronic kidney disease. he has lost weight and has a poor intake. the most likely cause is:
almond37 [142]
Chronic kidney disease is when your kidney is not functioning properly. Kidneys contain filters called nephrons. It is the their job to filter the blood of waste products and extra fluid. As a result, your body flushes the waste out as urine. The most common causes of chronic kidney disease are diabetes and high blood pressure. If your blood vessels contain a high concentration of sugar and cholesterol, the nephrons would take the exhaustive work. In the long run, if you keep eating unhealthy food, the kidney could no longer catch up. Thus, resulting to chronic kidney disease.
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