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bixtya [17]
3 years ago
7

Please help me need this before 4:30pm

Biology
2 answers:
Romashka [77]3 years ago
4 0

Answer:

the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

Explanation:

Dima020 [189]3 years ago
4 0
The atomic number= protons and neutrons
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In case if two species are closely related on the basis of external features, then they must be allowed to mate. The offspring produced in the first generation mating must be allowed to mate again. If in the second generation offspring are produced, then it shall prove that the two similar looking organisms are able to produce viable and fertile offspring thereby establishing the fact that they belong to same species.  

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Hope this helped :)

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