Hemichordates were not recognized until the 1800s because they
A)were considered roundworms.
B)are very rare.
C)are common but only around deep ocean vents.
D)have recently dramatically increased in numbers.
E)had secretive habits and fragile bodies.

Question

Quizplus · Accepted Answer

Hemichordates were not recognized until the 1800s because they have secretive habits and fragile bodies, making them difficult to study and classify.

Hemichordates Were Not Recognized Until the 1800s Because They