Biology - Evolution

Explore how evolution links life’s origins to the universe’s early chemistry, from water vapor and organic molecules to unicellular life, via the Big Bang theory and Miller’s laboratory test.

Miller's experiment recreated early earth conditions with ammonia, methane, water, and hydrogen, using electrical discharge to form water and organic molecules, implying pathways from non-living matter to unicellular life.

Explore the evolution of life forms through Darwin's fitness concept, evidence, adaptation to changing habitats, survival versus extinction, and the emergence of new species.

This lecture presents evidence for evolution from peppered moths in England, showing a shift from light to dark forms as pollution darkens tree trunks, illustrating natural selection in action.

Examine fossils and rock layers to reveal evolutionary history. Trace how species, from dinosaurs to modern birds and crocodiles, show evolution over time.

Identify embryonic similarities across vertebrates as evidence of common ancestry. Examine homologous forelimbs to illustrate divergent evolution, with references to the Green Revolution and White Revolution.

Examine adaptive radiation, where a single species diversifies into different forms across habitats, as seen in Galapagos finches’ beaks and Australian marsupials, enabling survival in varied environments.

Observe natural selection driving biological evolution as microbes respond to nutrient changes, altering survival and population sizes. Demonstrate adaptation under changing environments and ongoing evolutionary change.

Explore the Hardy-Weinberg principle and how allele frequencies stay constant across generations unless acted upon by mutation, recombination, genetic drift, or natural selection.

Trace the origin and evolution of man from apelike ancestors to Homo habilis, erectus, and sapiens, noting brain growth from 650-800 cc to 1,400 cc and the emergence of tools.