Question

Larvae of -------metamorphose into adults after settling down at bottom of the sea​

Answer 1

Answer:

Urochordata

Explanation:

Larvae of urochordata metamorphose into adults after settling down at bottom of the sea

Answer 2

Larvae of Sea urchin metamorphose into adults after settling down at bottom of the sea​.

• Echinoderms classified as sea urchins are spiky, spherical organisms.
• Although pluteus larvae have bilateral (mirror) symmetry, adult sea urchins have fivefold symmetry.
• The juvenile rudiment, which forms on the left side of the larva and has an axis perpendicular to the larva's, takes several months to fully grow.
• Before the juvenile rudiment may transition into the adult form, test plates form on its left side.
• The larva quickly descends to the bottom and, in as little as an hour, metamorphoses into a young urchin.
• Adults in some species grow to their fullest size in around five years.

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