What is density and what does it tell you about a substance

Density is the characteristic property of the substance. Density is related to mass and volume of the substance.

Explanation:

Density of the substance decides whether it will float or submerge in water or any other liquid. If the substance is denser than the liquid then it will sink and if its density is lower than the liquid then it will float.

Density is written in kilogram per cubic meter. For instance, the density of oil is lesser than water and hence, it floats.

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.