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sveticcg [70]
3 years ago
13

Researchers studying the rigidity and flexibility of the cell envelope used chemotaxis to measure the ability of microbes to squ

eeze through tight spaces. E. coli, a gram-negative bacterium, was able to traverse narrower channels than B. subtilis, a gram-positive microbe, even though both cells are the same size when grown without restriction. E. coli has the more flexible cell envelope becauseA. lipopolysaccharide has no charge.
B. it has fewer flagella.
C. it has only a single membrane.
D. there is less structural carbohydrate.
E. there are fewer protein receptors.
Biology
1 answer:
vlada-n [284]3 years ago
6 0

Answer:

D. there is less structural carbohydrate.

Explanation:

Most bacterial cells have a cell wall located outside the plasma membrane, formed by peptideoglycan or murein, which provides protection and shape to the cell. In addition to the wall, some bacteria have a polysaccharide capsule that surrounds this structure, this capsule is a carbohydrate envelope that can allow more or less flexibility to the bacterial cell. The more structural carbohydrates the polysaccharide capsule has the less flexible the bacteria will be. Thus, we can say that if E. coli has the most flexible cell envelope, compared to the envelope of other bacteria, it is because there is less structural carbohydrate in the E. coli envelope.

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"Superior vena cava carries completely digested substances"
Savatey [412]

Answer:

Yes.

Explanation:

As a blood vessel, Superior vena cava carries completely digested substances that is present in the blood from upper part of the body to the heart. Blood is a fluid that transport digested food from small intestine to other parts of the human body. It also carries oxygen from the lungs to the cells and also carries carbondioxide from the cells to lungs so we can say that Superior vena cava carries completely digested materials.

6 0
2 years ago
Write 3 paragraphs on the similarities and differences between the soils, and why each is important. Be as detailed as possible.
lana [24]

Answer:

Ox so it was cheese doodles night...She looked at her little girl who was about to become a teen. She tried to think back to when the girl had been younger but failed to pinpoint the exact moment when she had become a little too big to pick up and carry. It hit her all at once. She was no longer a little girl and she stood there speechless with fear, sadness, and pride all running through her at the same time.

The computer wouldn't start. She banged on the side and tried again. Nothing. She lifted it up and dropped it to the table. Still nothing. She banged her closed fist against the top. It was at this moment she saw the irony of trying to fix the machine with violence.

The trees, therefore, must be such old and primitive techniques that they thought nothing of them, deeming them so inconsequential that even savages like us would know of them and not be suspicious. At that, they probably didn't have too much time after they detected us orbiting and intending to land. And if that were true, there could be only one place where their civilization was hidden.

4 0
2 years ago
Can some one please help me !
Anika [276]

Answer:disease  preadertism and preadation

Explanation:

because of the sciency stuff

6 0
2 years ago
Read 2 more answers
A rat becomes a long tailed rat and a short tailed rat over 10000 years. What is this called ?
Lesechka [4]

Answer:

<em>Evolution</em>

Explanation:

Evolution can be described as the changes which occur in a population over a period of time. Over a period of time, organisms tend to evolve those characteristics which make them better adapted to live in an environment. Such changes which occur over a long period of time are termed as evolution. Charles Darwin was the scientist to bring forward the theory of evolution.

The change in the tail length of a rat over a course of many years is an example of evolution.

3 0
3 years ago
Read 2 more answers
Being interested in native butterflies, you include the native caterpillar host plants of several butterflies in your annual lan
svetoff [14.1K]

Answer:

d. introduce native flowering plants the adult butterflies need for nectar, their main food.

Explanation:

Organisms choose the habitat based on the availability of basic requirements such as food, nutrients, space, etc. in the region. The absence of one or more of these factors makes them choose another habitat. Butterflies feed on nectar made by plants in their flowers. To make the butterflies stay in the landscape, flowering plants adapted to local conditions should be planted. The butterflies would feed on the nectar of these plants and would stay in the landscape.

3 0
3 years ago
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