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Lostsunrise [7]
3 years ago
15

The function of the S layer is unclear. The fact that the S layer is found in cultures isolated from natural sources but is typi

cally lost by cells in laboratory cultures suggest the S layer may be important in growth at high cell densities.the S layer may play a role in protecting cells from viruses and predatory bacteria found in nature but not in laboratory cultures.the S layer is not necessary in nutrient rich environments.all of these choices.
Biology
1 answer:
mario62 [17]3 years ago
4 0

Answer:

The correct answer is "the S layer may play a role in protecting cells from viruses and predatory bacteria found in nature but not in laboratory cultures".

Explanation:

The S-layer (surface layer) is a part of the cell's envelope comprised of of identical proteins or glycoproteins that could be found in archaes and some bacterias in nature. The function of the S-layer is unknown, however the fact that is only seen in nature suggest that it may play a role in protecting cells from viruses and predatory bacteria found in nature but not in laboratory cultures. It is likely that archaes and bacteria synthesize the S-layer when they recognize viruses and predatory bacteria in nature, the S-layer is not synthesized in laboratory cultures because these pathogens are not present.

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Which of the following is not a reason we become shorter as we age?
Lady_Fox [76]

Answer:

The correct answer is - As a person ages, scoliosis may develop resulting in an abnormal spinal curvature and shorter stature.

Explanation:

Scoliosis is a condition in which spine curvature towards the sides takes place before the puberty during growth period or spurt normally. The cause of this condition could be muscle dystrophy or palsy and similar condition.

This affects the stature of an individual but not affected by age as it remains constant normally after development or growth till puberty. All other conditions are associated with the short stature and influenced by the age.

3 0
2 years ago
How are the asthenosphere and the mantle related
vampirchik [111]

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5 0
3 years ago
Explain how two organisms can have the same<br> phenotype but different genotypes. Give an example.
Jet001 [13]

Answer:

2 organisms can have the same physical traits but no matter what, every single living creature has different DNA. Like how twins can look the same but their DNA won't be exact.

Explanation:

6 0
3 years ago
Should you see signs of microbial growth in a sterile medium if you allow it to incubate for several days
frozen [14]

No, even after several days of incubation, you shouldn't detect any symptoms of microbial growth in a sterile medium.

<h3>What is the microbial growth in the sterile medium?</h3>

The deliberate introduction of germs into a sterile growing medium is known as immunization. When there are no living creatures present, a substance is sterile; undesirable bacteria are said to be contaminated. The use of aseptic procedures helps keep growing media from being contaminated. Reduce the amount of time that cultures and growth media are exposed to the outside world. Clean the work area both before and after each use. Avoid breathing or touching the stock cultures or sterile culture media. Before used, loops, needles, pipes, and other items should be sanitized. The tube caps should be held in your hand while inoculating and not placed on the table while using tubes.

Learn more about microbial growth here:

brainly.com/question/14732566

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5 0
1 year ago
If a population size begins to_______rapidly, this can be a signal that extinction is coming.
Yakvenalex [24]

Answer:

decreases

Explanation:

any decrease in the population can lead to a signal of extinction

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2 years ago
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