How are echinoderms uniquely different than other deuterostomes?

What will be an ideal response?


ANSWER: Echinoderms, as adults, are radially symmetric. Echinoderms have no excretory system or
respiratory system, and most have only a minimal circulatory system. The water vascular
system, which they use for locomotion, is unique.

Biology & Microbiology

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In multi-nucleate cells, which phase of the cell cycle is not utilized?

a. Mitosis b. Cytokinesis c. G1 d. G2

Biology & Microbiology

The structure at letter "B" is the ____ which ____

a. tongue; produces speech b. epiglottis; closes the larynx c. larynx; produces sound d. epiglottis; closes the esophagus e. pharynx; holds the trachea open

Biology & Microbiology

The ability of the surface waters of the ocean to take up carbon dioxide is governed by the reaction of carbon dioxide with the ________ ion to form bicarbonates

Fill in the blank(s) with correct word

Biology & Microbiology

What is the consequence of a mutation in the recA gene in bacteria?

What will be an ideal response?

Biology & Microbiology