Animal Kingdom
In sea urchin DNA, which is double stranded, 17 % of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are
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Single Choice
In starfish at the aboral end near the anus, a plate-like porous structure is found and is called:
ASkeleton plate
BMadreporite
Correct Answer
CPedicellariae
DTube feet
Solution
The madreporite is a light-colored calcareous 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 starfish. Hence, option B is correct.
SIMILAR QUESTIONS
Animal Kingdom
Presence of pedicellariae is the characteristic of
Animal Kingdom
The animal that has tube feet is:
Animal Kingdom
Which of the following echinoderm animal belongs to class Crinoidea?
Animal Kingdom
Echinoderms are characterized by:
Animal Kingdom
Which of the following echinoderm remain attached to some objects at some stage of life, has no pedicellariae and tube feet are without suckers?
Animal Kingdom
Echinoderms resemble chordates in having
Animal Kingdom
Which of the following echinoderm is not marine?
Animal Kingdom
Aristotle's lantern' is found in
Animal Kingdom
Radially symmetrical animals may occur in
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