Match the columns. Phylum Animal i. Protozoa a. Roundworm ii. Nematoda b. Amoeba iii. Arthropoda c. Star fish iv. Echinodermata d. Cockroach
i - b, ii - a, iii - d, iv - c
The correct answer is i - b, ii - a, iii - d, iv - c.
The skeleton is made of calcium carbonate. They have an open circulatory system. They breathe through gills or cloacal respiratory trees. Examples include starfish, sea urchin, common brittle star.
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