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Despite their seemingly simple anatomy and radial symmetry Sea urchins and sea star are a type of deuterostome, closely related to the chordates.
What are the characteristics of deuterostome?
Animals classified as deuterostomes share a common embryonic development.
The first opening during development known as the blastopore changes to the anus in deuterostomes while the mouth changes in protostomes.
They have a coelom, which forms as a result of enterocele (coelom from the digestive tract).
These creatures include the following,
- Chordata,
- Echinodermata,
- Hemichordata.
Hence the correct answer is Deuterostome.
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A heterotroph is an organism that relies on complex organic substances for nutrition. <span>A </span>heterotroph<span> is an animal that can't make its own food supply, so they have to eat other things, like plants or other animals, to survive. Hope this answers the question.</span>
