Show I give many of my IB Biology resources away, for the benefit of students and teachers around the world. What does the continuous variation across the geographical range of related species tell us about the process of evolution?Understanding: Continuous variation across the geographical range of related populations matches the concept of gradual divergence. Natural selection causes adaptation to the local environment, resulting in different genotypes or phenotypes being favoured in different environments.
How does geographic distribution Provide evidence for evolution?Biogeography, the study of the geographical distribution of organisms, provides information about how and when species may have evolved. Fossils provide evidence of long-term evolutionary changes, documenting the past existence of species that are now extinct.
What gives evidence for evolution?Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.
How does selective breeding provide evidence for evolution?Selective breeding of domesticated animals shows that artificial selection can cause evolution. Evolution of homologous structures by adaptive radiation explains similarities in structure when there are differences in function. Populations of a species can gradually diverge into separate species by evolution.
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Explain how continuous variation across geographical ranges is evidence of evolutionary change.
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