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antoniya [11.8K]
3 years ago
13

Definition of cell wall

Biology
1 answer:
natulia [17]3 years ago
5 0

Answer:

a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose.

Explanation:

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What features do all cells have?
wariber [46]
All cells have a nucleus in the middle of it (Hope that helps)
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3 years ago
How do both similarity and differences among amino acids allow them to form macromolecules with a wide variety of properties
ioda
The R group is what allows amino acids to form macromolecules with different properties. every amino acid has the same basic structure, the only difference is what the R group is made up of. The similarities allow the amino acids to form a chain while the differences allows them to have different functions. Hope this helped!
3 0
2 years ago
Purple sulfur bacteria and filamentous sulfur-oxidizers both A. accumulate sulfur as intracellular granules.B. fix nitrogen.C. p
aksik [14]

Answer:

Option A, accumulate sulfur as intracellular granules.

Explanation:

Purple sulfur bacteria  belong to the group of Proteobacteria. These probacterias are  anaerobic  in nature and yet are able to photosynthesise. They are usually found in  water environments  such as hot springs, stagnant water etc. They use sulphur (either in the form of sulfide, or thiosulfate) as an electron donor in their photosynthetic activity to oxidise sulfur thereby producing granules of elemental sulfur.

while filamentous sulfur oxidizers use nitrate instead of oxygen to oxidize sulfide thereby producing granules.

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3 0
3 years ago
Which of the following functions does the myelin sheath perform for a nerve cell?
Ira Lisetskai [31]

Answer:

a. insulation  

Explanation:

The myelin sheath provides increased cell isolation (increased membrane resistance) because there are no membrane leakage channels in which there is myelin.

In addition to no membrane leakage channels, there is also virtually no type of membrane channel when there is myelin sheath (eg sodium and potassium pumps), which causes the cell a lower need for protein synthesis, or that is, less energy expenditure.

8 0
3 years ago
Explain the relationship between correlation and causation.
ohaa [14]

Answer:

Correlation indicates that the two numbers are related in some way.

Causation requires more proof that there is no lurking variable that creates the relationship.

Explanation:

6 0
2 years ago
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