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kap26 [50]
2 years ago
11

A B-cell uses its surface antibodies as receptors to attach to specific antigens before they are taken in. By what mechanism doe

s a B cell engulf an antigen
Biology
1 answer:
madam [21]2 years ago
6 0

Answer:

\huge\boxed{\sf Endocytosis}

Explanation:

B-cells engulf an antigen by endocytosis.

<u>Endocytosis:</u>

The process by which cell takes up external materials by fusing them with plasma membrane is called endocytosis.

After engulfing the antigen, B-cells become sensitive to the pathogen.

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
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Answer:

decrease; an increase

Explanation:

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The formula for density is mentioned as under:

Density = mass/volume.

Here, in this question the reason why density of sea water will increase if temperature decreases is because a decrease in temperature will result into less movement and therefore lesser space between water molecules and lesser space indicates less volume. Since, volume and density has inverse relationship so less volume will be responsible for increase in density.

When it comes to salinity, an increase in salinity will result into the higher density of sea water. When salts dissolve into the water they add to the mass/weight of the water i.e. mass of the water increases with increase in salinity. Since, mass and density have direct relationship, an increase in salinity will increase the density of water.

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