A sea squirt is thought to be more closely related to vertebrates than once thought because
A) both the adult and larval forms of the sea squirt have a notochord.
B) adult sea squirts have notochords.
C) sea squirt larvae have a vertebral column.
D) both vertebrate embryos and sea squirt larvae have notochords.
E) adult frogs have notochords.

Question

Quizplus · Accepted Answer

Both vertebrate embryos and sea squirt larvae have notochords, which suggests a closer evolutionary relationship between the two than previously thought.

A Sea Squirt Is Thought to Be More Closely Related