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ludmilkaskok [199]
3 years ago
15

Pseudomonas aeruginosa is a non-fermenting GNR, it grows on EMB. Which of the following would be true (Circle none, one or many)

Biology
1 answer:
Dafna11 [192]3 years ago
7 0

Answer:

The correct answer is a. Pseudomonas aeruginosa would be colorless on EMB

Explanation:

Pseudomonas aeruginosa is a gram-positive bacteria that is rod shape. It shows a few nutritional requirements and can even adapt to those conditions in which the other bacteria can be adapt.

It is non-fermentative bacteria so it does not ferment lactose and other carbohydrates. As EMB agar contains lactose and some dye, therefore, the lactose fermenting bacteria ferment the lactose and show good growth and color change.

But as Pseudomonas aeruginosa is a non-fermentative bacteria it does not ferment lactose and does not show any color and forms a colorless colony. Therefore the correct answer is a.

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Answer:

3 community

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2 years ago
When the Grand Canyon was forming, a population of squirrels were separated into two groups. The north side of the canyon is at
mariarad [96]

Natural selection lead to different species when the squirrels were separated, some of them acquired traits better suited for their new environment. This allowed them to survive and reproduce better than others. Over time, each group evolved to display unique traits for their different environments until one species evolved into two.

Explanation:

The speciation in the squirrels due to the barrier in canyon occurred due to this. Such speciation is called allopatric speciation.

Speciation leads to formation of new species from the existing species due to change in their habitat or physical structure.

The squirrels on the two different side of canyon adapted to the habitat they are in. Their reproductive cycles, habitat and adaptation mode has become different due to the change in environment.

The species of squirrels became two as they reproduce and passed on the traits for survival in the environment which they had adapted.

The squirrels have become <em>reproductively isolated</em> also.

Genetic divergence takes place due to natural selection as squirrels arenow two different species.

6 0
2 years ago
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When two protein chains combine to form an active protein, the structural level is ________
Elanso [62]

When two protein chains combine to form an active protein, the structural level is quaternary.

<h3>What is a quaternary structure?</h3>

The quaternary and tertiary structure of a protein is the tridimensional shape of the protein, which involves protein domains.

The quaternary protein structure refers to the different arrangements generated by different protein subunits.

The primary structure of a protein involves its amino acid sequence, whereas the second structure involves protein chains.

Learn more about quaternary structure here:

brainly.com/question/5286438

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2 years ago
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5.Most of the fish in a lake produce a certain number of eggs each spring. However, one fish has the ability to carry and lay mo
ivolga24 [154]

Answer:

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8 0
3 years ago
What did the Clean Air Act allow citizens to do that no previous U.S. environmental law had allowed?
OlgaM077 [116]

Answer:

The correct answer to the question: What did the Clean Air Act allow citizens to do that no previous U.S. environmental law had allowed, would be: it was the first law that considered citizen lawsuits against the correct enforcement of the statutes stated in the Act.

Explanation:

The Clean Air Act, which was passed originally in 1963, and which has been amended since, with its last update being in the 1990´s, became the first time that the U.S government not only established federal funding for environmental issues, but also regulated environmental topics through EPA (Environmental Protection Agency, 1970) and considered the power that citizens could have to ensure the enforcement of the statutes and provisions considered in the Act. This consideration of citizen suits, is the most important  and relevant difference with earlier environmental laws.

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