1. What are the key postulates of cell theory?

1. Cells are the fundamental units of structure and in living organisms

2. All organisms are made up of 1 or more cells

3. Cells are created from other cells (cellular division)

Explanation:

Those are the 3 key points in the Cell Theory.

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

explanation:

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.