10. Fully-formed (adult) vertebrates might not have a lot in common, but their embryos show more similarities. What do all vertebrate embryos have in common at some point in their development? Choose three (3).

Question

(Be sure to compare fish, amphibian, reptile, bird, AND human embryos.)

A. fins

B. gill slits

C. limb buds

D. tails

Answer 1

B. Gill slits, C. limb buds, and D. tails are common to all vertebrate embryos at some point in their development, including fish, amphibian, reptile, bird, and human embryos. Fins are not present in all vertebrate embryos, as not all animals have fins as adults.