Approximately How Long Has There Been Life on Planet Earth

question 93

Multiple Choice

Approximately how long has there been life on planet Earth?

• A) 3.5 million years
• B) 35 million years
• C) 350 million years
• D) 3.5 billion years
• E) 35 billion years

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Definitions:

Sensitive Period

An early period during the development of an organism when it is particularly responsive to environmental stimulation. Outside of this period, the same environmental events have less impact.

Skill Level

The degree of competence or proficiency an individual has in performing a particular task or activity.

Aphasia

Any of a number of linguistic disorders caused by injury to or malformation of the brain.

Specific Language Impairment

A developmental disorder where children experience difficulties acquiring language despite normal intelligence and sensory abilities.