What are the three main parts of the endangered species act?

forbids government and private citizens from harming endangered and threatened species or their habitats

-ESA forbids trade in products made from species that are on the list

-requires the U.S Fish and Wildlife Service to maintain the official list of endangered and threatened organisms, and to develop recovery plans for each protected species.

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

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.