In pure water, a red blood cell from
an animal will swell and burst, but a
leaf cell from a plant will not. which
structure in the leaf cell is responsible
for this difference?

In pure water, a red blood cell from an animal will swell and burst, but a
leaf cell from a plant will not. the structure that is responsible for this is the cell wall.

The plant cell wall is made up of cellulose. Cellulose is a tough ,complex sugar that is used as a structural carbohydrate.

Among other uses the plant cell wall prevents over expansion of the cell usually caused by too much water. Animal cells do not have a cell wall and this is why they burst when they take in too much water.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.