Related Experiment Video

Updated: Jan 20, 2026

The Evidence for Evolution and Common Ancestor
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The Evidence for Evolution and Common Ancestor

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Tailored Plans: The Next Step in a Long Evolution

Rob Robinson1, Pam Silberman2, Cynthia Binanay3

  • 1chief executive officer, Alliance Health, Morrisville, North Carolina rrobinson@alliancehealthplan.org.

Summary

North Carolina is transforming Medicaid to offer "tailored" health plans for individuals facing behavioral health challenges. These plans will serve vulnerable populations, including those with serious mental illness and substance use disorders.

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The Evidence for Evolution02:55

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
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Convergent Evolution01:54

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Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
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Eukaryotic Evolution01:24

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The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
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Synteny and Evolution

John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
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