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katrin2010 [14]
2 years ago
7

In coastal regions, some animals live above sea level and other animals live in the

Mathematics
1 answer:
Nesterboy [21]2 years ago
7 0

Answer: Echinoderms are radially symmetrical animals that are only found in the sea (there are none on land or in fresh water). Echinoderms mean "spiny skin" in Greek. Many, but not all, echinoderms have spiny skin. There are over 6,000 species. Echinoderms usually have five appendages (arms or rays), but there are some exceptions.

Radial symmetry means that the body is a hub, like a bicycle wheel, and tentacles are spokes coming out of it (think of a starfish). As larvae, echinoderms are bilaterally symmetrical. As they mature, they become radially symmetrical.

Step-by-step explanation:

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