Phylogeny

AP Biology· difficulty 4/5

Bird wings and bat wings are

A
$Vestigial structures present in both lineages$
B
$Examples of co-evolution between predator and prey$
C
$Analogous structures — convergent evolution from different ancestral forms$
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D
$Homologous structures — derived from a common winged ancestor$

Explanation

Birds (theropod dinosaurs) and bats (mammals) evolved wings independently from quite different forelimb arrangements \to convergent/analogous. The forelimb skeleton itself IS homologous among tetrapods.

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