If I May:
Paleontology shows us that organisms have changed gradually over time, as reflected in the fossil record.
Biogeography shows us how new species only arise near very similiar species. Similar species share a common time and place.
Developmental biology shows us that an organism builds on ancestral features as it develops from a single cell.
Morphology shows us how organisms adapt ancestral features to new uses, even when there are more efficient solutions elsewhere in nature.
Genetics shows us that we can group species by similarity of genes. These groups even share unused DNA.
What evidence is there for evolution?
Lines of evidence: The science of evolution
At the heart of evolutionary theory is the basic idea that life has existed for billions of years and has changed over time.
Overwhelming evidence supports this fact. Scientists continue to argue about details of evolution, but the question of whether life has a long history or not was answered in the affirmative at least two centuries ago.
The history of living things is documented through multiple lines of evidence that converge to tell the story of life through time. In this section, we will explore the lines of evidence that are used to reconstruct this story.
These lines of evidence include:
Lines of evidence: The science of evolution
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