Select the incorrect pair from the following
A. Adamsia - Sea anemone
B. Echinus - Sea urchin
C. Antedon - Sea cucumber
D. Cucumaria - Sea lily

Both A and D

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Both C and D

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Both B and D

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Both A and B

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Solution

The correct option is B Both C and D
The members of phylum Echinodermata are exclusively marine, found all over the world. Phylum Echinodermata is characterized by features like:
(1) Unsegmented, triploblastic, and coelomate animals
(2) Adults radially symmetrical but larvae are bilaterally symmetrical
(3) Without head and no segmentation.
Examples: Antedon( feather star), Cucumaria( sea cucumber), Adamsia( sea anemone), Echinus( sea urchin).
Thus option B is the correct answer.

Suggest Corrections

i. Sea cave	a. Steep rocky coasts rising vertically above the sea water
ii. Sea arches	b. Hollowed out rocks formed by the action of sea waves
iii. Sea stacks	c. Sea caves with openings on both sides
iv. Sea cliff	d. Isolated wall-like structures created by the thrashing action of sea waves