The Mass Extinction at the End of the Permian Period

question 35

Multiple Choice

The mass extinction at the end of the Permian period (about 250 mya) is thought to have killed off as many as 60 percent of the animal families.What group of animals dominated life on land at that time?

• A)trilobites
• B)mammals
• C)reptiles
• D)amphibians

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Definitions:

Culture Medium

A nutrient-rich substance used to grow microorganisms, cells, or small plants in a controlled environment.

Attention Deficit Hyperactivity Disorder

A neurological disorder characterized by patterns of inattention, hyperactivity, and impulsivity that interfere with functioning or development.

Hyperactivity

An abnormal level of activity or energy, often manifesting as restlessness or difficulty remaining still or focused, commonly seen in disorders such as ADHD.

Inability

A lack of ability, emphasized in various contexts such as physical, cognitive, or skill-based scenarios.