How Many Mass Extinctions Have Occurred Over the Last 500

question 14

Multiple Choice

How many mass extinctions have occurred over the last 500 million years?

• A) 5
• B) 1
• C) 4
• D) 3

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Definitions:

Reflex Arc

A neural pathway that controls an action reflex, involving a sensory neuron, a motor neuron, and typically an interneuron, to facilitate a quick automatic response to stimuli.

Scientific Thought

A systematic way of questioning and examining the natural world, and the analysis of empirical evidence to reach conclusions.

Intellectual Growth

Intellectual growth is the development of mental faculties and cognitive abilities, often through learning, education, and experience.

Visual Field

the entire area that can be seen when the eyes are focused on a single point, encompassing both the central and peripheral vision.