Front

What is the change in species over time called?

Back

Evolution

Front

An informal unit of geologic time consisting of the first three eons during which Earth formed and became habitable is called the _________.

Back

Precambrian

Front

What is the building block of proteins?

Back

Amino Acids

Front

What are microscopic, photosynthetic prokaryotes that formed stromatolites and changed early Earth’s atmosphere by generating oxygen?

Back

Cyanobacteria

Front

The ancient geographic setting of an area is known as _________.

Back

Paleogeography

Front

What is the process by which organisms better adapted to their environment tend to survive and produce more offspring?

Back

Natural Selection

Front

What term describes the gradual process by which ecosystems change and develop over time?

Back

Ecological Succession

Front

What is the term for a preserved remains or traces of ancient organisms?

Back

Fossil

Front

What is the theory that explains how continents have moved over geological time?

Back

Plate Tectonics

Front

What is the term for the variety of life in the world or in a particular habitat or ecosystem?

Back

Biodiversity