You discover a radial symmetrical animal in an early development stage.How would you determine if it is an echinoderm or cnidarian?
A)Radiates have a tube-within-a-tube body plan.
B)Determine if two embryonic layers are present.
C)A digestive cavity is found in echinoderms.
D)True tissues are found in echinoderms.

Question

Quizplus · Accepted Answer

The presence of two embryonic layers can distinguish between echinoderms and cnidarians. Echinoderms have a triploblastic body plan, whereas cnidarians have a diploblastic body plan. Radial symmetry is present in both echinoderms and cnidarians at an early developmental stage. A digestive cavity is present in both groups, and true tissues are found in cnidarians, but not in echinoderms.

You Discover a Radial Symmetrical Animal in an Early Development