Answered

. Limb bones within unrelated animals that have the same basic structures are considered

Avestigial structures.
Bhomologous structures.
Cembryological.
Danalogous structures.

Verified Answer :

Neuron

When you have unrelated animals in biology which have limbs that have the same basic structure we consider these things to be homologus. As the first poster noted, an example is a wing of a bird or a hand of a human. When we're talking about analogous structures, we're talking about things which perform the same function yet don't have the same structure.

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