If biologists are able to create a population of bacteria able to digest oil spills using selective pressures,

Question

what is true?



some bacteria in orginal population had the ability to digest oil.


bacteria in population were genetically engineered to digest oil.


some bacteria in original population were resistant to antibiotics.


bacteria in population that could digest oil were selected against.

Answer 1

The first answer is true. If you use selective pressure, it means you are breeding to obtain a desired phenotype. In order for that to occur, you had to have some initial members of the population that could digest the oil.

FYI the first answerer is wrong.

Answer 2

The first choice is the correct.
In any given population of bacteria, there is always a portion (variable) that do not posess the same exons, (expressing the properties of the new gene induced, and not producing the transcription RNA from the nucleus to ribosomes),at the time of exhibiting the porperties you do expect from that population of bacteria, enxymatic destruction of oil) either, because the gene induction by pressure is incomplete, or some of them, have prematurely mutated to form non-digesting forms that will not metabolize oil.

Answer 3

What are you saying use selective pressures? Biologists or bacteria? If bacteria can be created??
There already are biological agents are chemicals or organisms that increase the rate at which natural biodegradation occurs. Biodegradation is a process by which microorganisms such as bacteria, fungi, and yeast break down complex compounds into simpler products to obtain energy and nutrients. Biodegradation of oil is a natural process that slowly - sometimes over the course of several years - removes oil from the aquatic environment. However, rapid removal of spilled oil from shorelines and wetlands is necessary in order to minimize potential environmental damage to these sensitive habitats.

Bioremediation technologies can help biodegradation processes work faster. Bioremediation refers to the act of adding materials to the environment, such as fertilizers or microorganisms, that will increase the rate at which natural biodegradation occurs. Two bioremediation technologies that are currently being used in the United States for oil spill cleanups are fertilization and seeding.

Fertilization, also known as nutrient enrichment, is the method of adding nutrients such as phosphorus and nitrogen to a contaminated environment to stimulate the growth of the microorganisms capable of biodegradation. Limited supplies of these nutrients in nature usually control the growth of native microorganism populations. When more nutrients are added, the native microorganism population can grow rapidly, potentially increasing the rate of biodegradation.

Seeding is the addition of microorganisms to the existing native oil-degrading population. Sometimes species of bacteria that do not naturally exist in an area will be added to the native population. As with fertilization, the purpose of seeding is to increase the population of microorganisms that can biodegrade the spilled oil.

Answer 4

A is true. They just kept selecting the ones that could digest the oil until that was a common trait in the population.

Answer 5

Possibly one or possibly two. Definately not three or four.

But you'd better know and understand the implications of the rabbits in Australia story before doing any of this.

Answer 6

none are necessarily true. all are based on false premises