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All vertebrate embryos, including humans, show which structures early in development?

AWings and feathers
BFur and sharp claws
CScales and dorsal fins
DGill slits and tails
Answer & Solution
Correct answer: D. Gill slits and tails
1. Embryology shows relatedness. 2. Gill slits and tails appear in all vertebrate embryos. 3. They vanish in land-dwelling adults. _Source: OpenStax Biology 2e, Chapter 18, Evolution and the Origin of Species (CC BY 4.0)._
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