The LEAST most parsimonious explanation for the existence of beaks in birds is that

a. they arose once in a common ancestor of beaked groups.
b. they arose multiple times in different bird lineages.
c. they are a product of convergent evolution among birds.
d. they are not a genetically determined trait, and thus independent characters.
e. they arose one time in one bird lineage


E

Biology & Microbiology

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