Question

assignment content
page 8 of 10
question 8
starfish and sea urchins belong to the phylum:
a arthropoda
b echinodermata
c chordata
d nematoda
e mollusca

Explanation:

Starfish and sea urchins are marine animals. Arthropoda includes insects, crustaceans etc. Chordata has animals with a notochord. Nematoda are round - worms. Mollusca has snails, octopuses etc. Echinodermata is characterized by radial symmetry (in adults), spiny skin, and a water - vascular system which starfish and sea urchins possess.

Answer:

B. Echinodermata