A Sea Urchin Is a Member of the Phylum

question 90

Multiple Choice

A sea urchin is a member of the phylum

• A) Echinodermata.
• B) Mollusca.
• C) Annelida.
• D) Platyhelminthes.
• E) Arthropoda.

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Definitions:

Neural Firing

The process by which a neuron sends an electrical signal across a synapse to another neuron.

Dreams

A series of thoughts, images, and sensations occurring in a person’s mind during sleep.

Rotating Shift Work

A work scheduling system in which employees change their work hours or shifts regularly, often seen in 24-hour operation sectors.

Circadian Cycle

A roughly 24-hour cycle in the physiological processes of living beings, including humans, influencing sleep-wake patterns, hormone release, and other bodily functions.