Scientists Have a Very Complete Fossil Record Showing the Evolution

question 49

Multiple Choice

Scientists have a very complete fossil record showing the evolution of horses over millions of years,with the legs becoming longer and the teeth larger,as ancestors of the modern horse adapted from living in forest to grasslands.This is an example of

• A) extinction.
• B) punctuated equilibrium.
• C) adaptive radiation.
• D) gradualism.
• E) a prezygotic barrier to evolution.

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Definitions:

External Causes

Factors or circumstances outside the control or influence of an individual that contribute to a particular outcome or situation.

Internal Causes

Causes that originate within an individual, such as personal beliefs, emotions, or motives.

Refute

To prove a statement, theory, or argument to be wrong or false.

Stereotype Threat

The risk of confirming negative stereotypes about one's group, which can hamper performance in a variety of settings.