Class Notes (834,734)
United States (323,898)
01:119:115 (825)
D'arville (38)

Ch. 18.doc

2 Pages
Unlock Document

Biological Sciences

Ch. 18 Evolution 1 4/3/12 Idea to explain biodiversity • Creation: was the only idea for several millennium • 1619: Lucilio Vanini • Darwinian evolution: accumulated inherited changes in a population over time • He didn’t come up with it, he came up with the mechanism of natural selection, not evolution itself. Natural selection is what projected it to what it is today • Darwin, Malthus, • Lyell: principles of geology, suggested that the earth was not 4,000 years old, but beyond what we can imagine in age. It just evolved. • Influenced darwin. • Lamarck: came up with first theory of evolution. Species do change over time, becuase they have acquired traits of time • The ancestrial giraffes were short necked...when food became scarce and they had to reach higher and higher in the trees for food, the neck began to stretch over the generations ....however, Jewish people remove foreskin, yet have not evolved the complete • removal • If your parents were good at bio, does that mean you will be? • Fluched idea • Darwin: giraffes have long necks because there used to be long and short necks, but when food became scarce, the shorter necked ones could not reach the food, and thus became extinct, unlike the long necked who reached the food and maintained their life • Individuals born with traits that make them best adapted for their environment are also the ones most likely to survive and produce offspring • Arguments: • Overproduction: organisms produce more offspring that can survive to reproduce • Limits on population growth: growth is logarithmic, not exponential. Resources are limited so there is a “struggle for existence” • Variation: individuals within species vary (some are more ‘fit’ than others). The raw material for evolution • Differential reproductive success: natural selection acts on variation ← ** reproduction is the key to natural selectionL the most fit individuals produce the most offspring The evidence:
More Less

Related notes for 01:119:115

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.