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Ozone Layer

His Studies on the changing Earth and its age influenced Darwin.

Modern Theory of Evolution

Index Fossil

Cyanobacteria (Blue-green algae)

Thomas Malthus

Cenozoic Era

Selective Breeding

Paleozoic Era

Added oxygen gas to the atmosphere

Break in the rock record

Species that is abundant in the fossil record and lived during a specific time period.

Charles Lyell

Age of the Mammals

Jawless Fish

Blocks harmful UV radiation allowing life to evolve on land

Darwin’s Theory of Natural Selection + Modern Genetics

Unconformity

Dinosaur Mass Extinction

“Tree of Life”

Dominated by aquatic invertebrates; fish; amphibians & then reptiles

First Vertebrates

His human overpopulation studies influenced Darwin.

Homologous Structure

Vestigial Structure

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