Both echinoderms and chordates are deuterostomes. This means that
A) they have a similar development in their embryonic stages.
B) they both have eyes with retinas.
C) they both start with radial symmetry in their early embryonic stages.
D) they both use calcium-based endoskeletons.
E) they are both invertebrates.

Question

Quizplus · Accepted Answer

Deuterostomes are a group of animals whose embryos undergo a specific type of development. Both echinoderms and chordates are deuterostomes and share similar early embryonic stages, where the blastopore becomes the anus and the mouth forms later in development.

Both Echinoderms and Chordates Are Deuterostomes