It stays roughly the same size. Electrons have a barely imperceptible mass so the overall mass of the atom is changed very little.
The answer is the fourth choice, or Have membrane-bound organelles. Hope this helps you!
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-Belle
Answer:

Explanation:
Number of molecules of water = 
= Avogadro's number = 
Number of moles is given by


The number of moles of water is
.
Species are the smallest groups. A species consists of all the animals of the same type, who are able to breed and produce young of the same kind. For example, while any two great white sharks are in the same species, as are any two makos, great whites and makos are in different species (since they can't interbreed Answer :SPECIES