BIOL 1202 Lecture Notes - Lecture 4: Gregor Mendel, Balaena, Divergent Evolution
2 Jul 2015
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Observation 1: given unlimited resources (nutrients), living organisms tend to reproduce as fast as it can. Observation 2: population size goes up until it reaches capacity and stabilizes. Can infer that there is competition for survival (struggle) The fittest organism, leaves behind the most offspring. Struggle + variability in structures and behavior = natural selection. Natural selection + some variability = evolution genetic makeup change over time. Evolution change in the allele (variation) frequency in a population over time. Wilfred wallace naturalist with a similar idea as darwin. About 10 billion that come from a common ancestor. What is science: the observation, identification, description, experimental investigation, and theoretical explanation of phenomena, concerned with natural phenomena, creationism (religion) is not taught. Theory: general explanation of natural phenomena, developed through a lot of observations. Hypothesis: tentative explanation of observations educated guess , an idea that you can test. Using isotopes, scientist can date fossils from the surrounding rocks.
