ice cores

comparative anatomy

law of superposition

the theory of plate tectonics

The environment causes genetic variation in a population of

organisms, which allows them to adapt to their environment.

Genetic variations in a population of organisms result in individuals

with similar genetic traits and the ability to adapt to their

environment.

Organisms of a population have certain traits that enable them to

adapt to changes in the environment, survive, and pass these traits

on to offspring.

A population of organisms with little genetic variation is better able

to adapt to changes in their environment than organisms with a lot of

genetic variation.

Through artificial selection, larger horses survived and were chosen to

reproduce offspring.

Through artificial selection, small horses were bred out of the gene

pool, leaving only larger horses.

Through natural selection, favorable adaptations were passed to

offspring, allowing for the evolution of the horse.

Through natural selection, horses acquired traits that produced

changes and then were passed on to their offspring.

genetic mutations

common ancestors

reduction of habitats

environmental conditions

They had traits that helped them adapt to environmental changes.

They were larger than dinosaurs and ate different foods.

They lived in different areas on Earth than dinosaurs.

They were able to hibernate for thousands of years.