Warm Up: What is Natural Selection?

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Presentation transcript:

Warm Up: What is Natural Selection? Lab Reports Due Today Quiz changed Wednesday: Study guide on website What it is to be human Supporting cast in archeology Hominids Darwin’s Theory of Evolution Carbon 14 Dating

Natural Selection Process by which organisms with favorable variations survive and reproduce at a higher rate. Peppered Moth Lab 1 Black sheet of card stock 1 whole punch 1 white sheet of card stock 1 Tweezer Will need to make your dark and white circles with whole punch!!!!

Adaptation Patterns of Evolution Hawaiian Honeycreepers: Similarities in skeletal and muscular structure lead scientists to believe that 23 Species of honeycreepers evolved from one ancestral species the finch. This pattern where many related species evolved from a single ancestral species is called :adaptive radiation Commonly occurs when a species invades an isolated Region that has very little competition. member of a group of related birds, many of them nectar-eating, that evolved in the forests of the Hawaiian Islands and are found only there. Recent evidence from osteology, behaviour, plumage, breeding biology, and genetics has led to a consensus that the Hawaiian honeycreepers are closely related to the cardueline finches

More Adaptation Adaptive Radiation is one example divergent evolution is the process of 2 or more related species more and more dissimilar. Convergent evolution when unrelated species adapt to the same kind of environment. Coevolution: The joint change of 2 or more species in close interaction. Predators and pray sometimes coevolve; parasites/hosts; plant eating animals/plants Examples :plants and animals that pollinate them, bats that feed on flowers have a slender muzzle and a long tongue. Divergent evolution, convergent evolution, and coevolution are different ways organisms adapt to the environment

CoEvolution

Microevolution(minor; witin a species)/Macroevolution(above species level) Microevolution is simply a change in gene frequency within a population.

Macroevolution Macroevolution generally refers to evolution above the species level. So instead of focusing on an individual beetle species, a macroevolutionary lens might require that we zoom out on the tree of life, to assess the diversity of the entire beetle clade and its position on the tree.

Exit Slip: What characteristic of a population is most important in order for the population to survive a constantly changing environment? In most populations, organisms with many different genetic variations survive, reproduce, and leave offspring carrying their genes in the next generation…. It’s not survival for the fittest… But they are fit enough to reproduce and pass on their genes to the next generation. The more fertile offspring an organism leaves in the next generation, the fitter it is.