Evolutionary History Chapter 1 and 2 Practice!

A related organism from a previous generation.

• Descendant

• Common ancestor population

• Ancestor

• Descendant species

A part of an organism (for example, one or more bones).

• Body structure

• Fossil

• Limb

• Extinct

Everything (living and nonliving) that surrounds an organism

• Population

• Community

• Environment

• Evolution

The process by which species adapt to environmental changes over a very long time

• Natural selection

• Environment

• Generation

• Evolution

The process by which one population evolves into two or more different species

• Descendant

• Common Ancestor Population

• Speciation

• Mutation

a scientist who studies fossils in order to understand the ancient history of life on Earth

• descendant species

• shared structure

• paleontologist

• speciation

Imagine a population of frogs that live in the forest. The frogs have a green coloring on top that helps them blend into the forest so they are not noticed by predators.

Imagine that half of this population stayed in the forest and the other half of the population moved to the hills above the forest, which are drier, with some brown grass and brown soil.

Which population of frogs is likely to have more changes after many generations?

• Descendant Species 1: The frogs in the brown hills.

• Descendant Species 2: The frogs in the green forest.

• Neither.

The mystery fossil

• 
• 
• 
•