6. Which of the following are not lophophorate animals? a. Bryozoans; b. Phoroni

Question

6. Which of the following are not lophophorate animals? a. Bryozoans; b. Phoronids; c. Brachiopods; d. Ophiuroideans. 7. Crabs and shrimp belong to the Class: a. Insecta; b. Arachnida; c. Crustacea; d. Gastropoda. 8. Trilobites are members of which phylum? a. Mollusca: b. Arthropoda; c. Echinodermata; d. Annelida. 9. The endoskeleton of echinoderms is composed of: bone; b. cartilage; c. plates of calcium carbonate; d. spicules; e. chitin. a. 10. Which is NOT important in the movement of the seastars? a. ampullae; b. tube feet; c. skin gills; e. radial canal. 11. Which of the following is not true about Asteroidea and Echinoidea: a) Both have a water vascular system; b) Both develop from bilateral larvae; c)Both have arms radiating from a central disk; d) both are herbivores.

Explanation / Answer

6) The correct answer is option D that is ophiuroideans because it belongs to the echinodermata. Option A, B and C belong to lophophorate

7) The correct answer is option C that is crustacea.

8) The correct answer is option C that is Arthropoda.

9) The correct answer is option C that is plates of calcium carbonate.

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