History of Life Study Guide

Front

What is evolution?

Back

Evolution is a change in a species over time.

Front

What are homologous structures?

Back

Homologous structures are similar bone structures in different species that indicate a link to a common ancestor.

Front

What is mass extinction?

Back

Mass extinction is a rapid and widespread decrease in biodiversity, leading to the extinction of many species.

Front

What is adaptation?

Back

Adaptation is a change in a species that helps it survive in its environment.

Front

What does it mean for a species to become extinct?

Back

A species becomes extinct when there are no more individuals left of that species.

Front

What is the significance of Eohippus in horse evolution?

Back

Eohippus is an ancient ancestor of the modern horse, showing similar structures in limb bones.

Front

What is the role of environmental influences in evolution?

Back

Environmental influences can drive changes in species, leading to adaptations or evolution.

Front

What is the difference between gradualism and punctuated equilibrium?

Back

Gradualism is the slow and steady evolution of species, while punctuated equilibrium is characterized by rapid changes followed by long periods of stability.

Front

What are adaptations?

Back

Adaptations are traits that improve an organism's ability to survive and reproduce in its environment.

Front

What is a common ancestor?

Back

A common ancestor is a species from which two or more different species have evolved.