323
Question
In starfish at the aboral end near the anus, a plate like porous structure is found, called as
In starfish at the aboral end near the anus, a plate like porous structure is found, called as
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Solution
The correct option is B Madreporite
Madreporite is a lightcolored calcerous opening used to filter water into the water vascular system of echinoderms. It acts like a pressure-equalizing valve. It is visible as a small red or yellow button-like structure, looking like a small wart, on the aboral surface of the central disk of a star fish. Hence, option B is correct.
Madreporite is a lightcolored calcerous opening used to filter water into the water vascular system of echinoderms. It acts like a pressure-equalizing valve. It is visible as a small red or yellow button-like structure, looking like a small wart, on the aboral surface of the central disk of a star fish. Hence, option B is correct.
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