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In Recent Years, Which of the Following Has Been Negative

question 128

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In recent years, which of the following has been negative?


Definitions:

Echinoderms

A phylum of marine animals known for their radial symmetry and include starfish, sea urchins, and sea cucumbers.

Water-Vascular System

A unique hydraulic system used by echinoderms (such as starfish and sea urchins) for locomotion, feeding, and gas exchange.

Echinoderms

A phylum of marine animals known for their radial symmetry and include species such as starfish, sea urchins, and sea cucumbers.

Hermaphrodite

Animal that has both male and female gonads, either simultaneously or at different times in its life cycle.

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