Answer:
Hi, there the answer is D. related
Explanation:
Homologous structures are similar structures in related organisms.
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There are sometimes similarities in the embryonic stages of organisms that do not exist in the adult stages.
The stability of atoms depends on whether or not their outer-most shell is filled with electrons. If the outer shell is filled, the atom is stable. Atoms with unfilled outer shells are unstable, and will usually form chemical bonds with other atoms to achieve stability.
