Echinoderms are characterized by the presence of:

Water-driven tube system

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Spiny skin

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Both A and B

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Jointed legs

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Solution

The correct option is C Both A and B
Echinoderms are exclusively spiny-skinned marine animals. Echinoderms have a water-driven tube system that is used for locomotion, nutrition, predation, and gaseous exchange.
Some of the examples of echinoderms are sea star, sea urchin, etc.
Hence, the option C is correct.

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Question 19
The locomotory organs of Echinodermata are

(a) tube feet
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Question 18
Which one of the following feature is not a characteristic of protochordata?

(a) Presence of notochord
(b) Bilateral symmetry and coelom
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Question 18
Which one of the following feature is not a characteristic of protochordata?

(a) Presence of notochord
(b) Bilateral symmetry and coelom
(c) Jointed legs
(d) Presence of circulatory system

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