How did life begin on a young Earth, and how do we know that species have changed? You meet the experiments on the origin of life, and the evidence from fossils, from the bodies of animals, from embryos and from molecules. Then you follow Darwin's idea of natural selection, with the moths of England, the finches of the Galapagos and the pouched mammals of Australia. It serves the Indian syllabus (NCERT, NEET) and the matching topic of A-Level, IB and AP.
3 lessons, about 1 h 30 min3 simulations10 problems3 practice questionsPython in every lesson
The Earth is about 4.5 billion years old, and life is almost as old as its oceans. How did the first living things come from non-living matter? This lesson follows the old ideas, the experiment that set one of them aside, and the chemical story of Oparin, Haldane and Miller.
If species change over time, they should leave marks. Fossils in rock layers, shared bones in different animals, the early embryo and the molecules of the cell are all marks of one family tree. This lesson reads each kind of evidence.
Charles Darwin saw that living things leave more young than can survive, and that the young differ. The ones whose differences suit their surroundings leave more descendants. This lesson follows the idea, shows it at work in moths, finches and marsupials, and separates adaptive radiation from convergent evolution.
Log in to join the discussion.
Loading…