What Percentage of All Living and Fossil Animals Are Invertebrates

question 10

Multiple Choice

What percentage of all living and fossil animals are invertebrates?

• A) 10%
• B) 50%
• C) 70%
• D) 90%

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Definitions:

Dopamine Antagonists

Drugs that block dopamine receptors, often used to treat psychiatric disorders such as schizophrenia and bipolar disorder.

Schizophrenia

A complex mental disorder characterized by disruptions in thought processes, perceptions, emotional responsiveness, and social interactions.

Nigrostriatal Dopamine Pathway

A neural pathway in the brain that plays a major role in movement control.

Mesolimbic

Refers to a pathway in the brain involved in reward, pleasure, and reinforcement learning, part of the dopamine system.