Charles Darwin & Natural Selection

How did geology help Charles Darwin

Because earth changes so slowly that it could be missed in a lifetime:

• could life change slow to

Evolution

The change in a POPULATION of organisms, change in frequencies of genes/allels

Gene pool

total of all genes present in a gene pool

Galapagos Islands were helpful because

they were close islands with different climates, creating variation based on the island

Natural selection

mechanism for evolution

what are the 4 observable traits if natural selection

overproduction, variation, competition, survival

Overproduction

more will survive to pass genes along (more chances for improvments)

Variation

variation among offspring

competition

“struggle for existence” compete for resources

survival

survival of the fittest:

• offspring with the most favorable characteristics will survive

• reproduce increasing frequency of the helpful genes

artificial selection

breeding for desired traits (domesticated plants/animals)

Alfred Wallace

• Darwins mini me

• naturalist/school teacher

• went on amazon trip found out what Darwin did and sen him an essay

CHARLES DARWIN

naturalist who surveyed south American cost for five years..finches