Question

Which of the listed relationships between groups is correct?

A. Chelicerates are a group of arthropods.
B. Gastropods are a group of mollusks.
C. Hemichordates are a group of chordates.
D. Myriapods are a group of insects.
E. Sea urchins are a group of echinoderms.

Answer 1

A. Chelicerates are a group of arthropods

E. Sea urchins are a group of echinoderms

B. Gastropods are a group of mollusks

Step-by-step explanation:

Chelicerates are primitive arthropods having 6 pairs of appendages. 1 oral appendage used for feeding and lack actual mouth parts for chewing up "suck up predigested food". Cephalothorax is the largest and Abdomen contains gills.

Sea urchins are a group of echinoderms as they have spin skin , all marine and found in the bottom of the sea.

Gastropods are the largest and most varied group of molluscs. Gastropod means stomach footed, a typical gastropod is a coiled mass of organs enclosed in a dorsal shell, which rests on the foot having a head ans sensory structures on head and having an operculum.