The Following Questions Refer to the Paragraph Below

question 49

Multiple Choice

The following questions refer to the paragraph below.
A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly "jet" through the water. Watching further, she is able to conclude that the "mystery organisms" are ambush predators, and their prey includes everything from insects to small fish and tadpoles.
-Protostomes that have an open circulatory system and an exoskeleton of chitin are part of which phylum?

• A)Cnidaria
• B)Annelida
• C)Mollusca
• D)Arthropoda
• E)Echinodermata

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Definitions:

Manic-Depressive Psychosis

An older term for bipolar disorder, characterized by extreme mood swings between mania and depression.

Opponent Process Model

A psychological and neurological model that explains a wide range of behaviors, including color vision and emotions, by proposing that elements in the visual system or emotional reactions operate in opposing pairs.

Cocaine

A powerful stimulant drug derived from the leaves of the coca plant, which is illegal in many countries due to its highly addictive properties and health risks.

Addicted

The state of being compulsively committed or habituated to a substance, thing, or activity, leading to physiological or psychological dependence.