While sampling marine plankton in a lab, a student encounters large numbers of fertilized eggs. The student rears some of the eggs in the laboratory for further study and finds that the blastopore becomes the mouth. The embryo develops into a trochophore larva and eventually has a True coelom. These eggs probably belonged to a(n)
A)chordate.
B)echinoderm.
C)mollusc.
D)nematode.
E)arthropod.

Question

Quizplus · Accepted Answer

The presence of a blastopore that develops into a mouth, development into a trochophore larva, and presence of a true coelom are all characteristics of mollusks.

While Sampling Marine Plankton in a Lab, a Student Encounters