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Sever21 [200]
3 years ago
11

The cell membrane protects the cell, separates the internal and external environments, and does not allow any material to enter

or exit the cell.
Biology
1 answer:
nignag [31]3 years ago
3 0

Answer:

This statement is true.

Explanation:

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lots of points Viruses and bacteria can infect human cells. Bacteria are living organisms, while viruses are not. How do you thi
timofeeve [1]

Answer:

I did not understand questions

5 0
3 years ago
Blood contains nacl, protein, and cells. the nacl is in a(n) __________, the protein is in a(n) __________, and the cells are in
andreev551 [17]
The answers are solution, colloid, and suspension respectively. 

NaCl or salt is dissolved in the blood. So this makes blood and salts a solution. You won't be able to discern the NaCl in a solution of blood and NaCl.

Proteins in the plasma make blood a colloid. Protein particles are bigger than particles in a solution but are smaller than particles in a suspension. 

Lastly, blood cells and blood make up a suspension. You would notice this characteristic in blood because red blood cells settle. 

You can observe this when your blood is drawn. When it is placed in a test tube and left alone or placed in a centrifuge. The components separate into liquid on top, where you cannot see particles like salt; plasma in the middle, which has pale yellow color and also contains proteins; and the red blood cells at the bottom that settled. 

6 0
3 years ago
Can somebody please help me with all the question?
posledela

Answer:

no

Explanation:

8 0
3 years ago
What are the three types of muscle fibers
vova2212 [387]

Answer:Skeletal, cardiac and smooth

Your welcome!

5 0
3 years ago
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The sequences of nitrogenous bases in DNA varies widely. The
ivann1987 [24]

Answer:

it provides Instructions for traits of an organism

Explanation:

I got it from quizlet

4 0
3 years ago
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