Question

write down the characteristics of. 1 phylum mollusca. 2 echinodermata 3hemichordata​

Answer 1

Answer:

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Explanation:

1. Molluscs (also know as mollusks) are soft-bodied, bilaterally symmetrical, segmented, coelomate animals; usually shelled having a mantle, ventral foot, anterior head, and a dorsal visceral mass.
2. They have a star-like appearance and are spherical or elongated. They are exclusively marine animals. The organisms are spiny-skinned. They exhibit organ level of organization. They are triploblastic and have a coelomic cavity. The skeleton is made up of calcium carbonate.
3. Hemichordata is bilaterally symmetrical and triploblastic animal.They are exclusively marine animals.They can be solitary or in colonies.Hemichordata have a true body cavity or coelom.

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Answer 2

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