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Lisa [10]
3 years ago
15

Sea urchins are spiny, globular animals that live on the ocean floor. How are sea urchins classified?

Biology
2 answers:
Yuki888 [10]3 years ago
6 0

Answer:

<u><em>B</em></u>

Explanation:

They have no bones, and therefore, they are classified as a <u>in</u>vertebrate(s).

yan [13]3 years ago
3 0

Answer:

B

Explanation:

because they belong to classe Echinoidea, phylum echonodermata

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