Definition of Evolution (Darwin's time):
Descent with modification.
Definition of Evolution (currently):
A change in the genetic composition of a population from generation to generation.
Descent with modification:
A phrase Darwin used in proposing that Earth's many species are descendants of ancestral species that were different from the present-day species.
2 other ways in which evolution can be viewed:
Pattern and process.
The pattern of evolution:
is revealed by data,(from biology, geology, physics, and chemistry) these data are facts, they are observations about the natural world.
The process of evolution:
consists of the mechanisms that produce the observed pattern of change.
Name the people Darwin was influenced by:
Look at the time line on pg. 463
How did Aristotle view evolution:
Thought there was none, thought things were fixed and unchanging.
Defined by Aristotle as scale of nature, where each form of life, perfect and permanent has it's place on a ladder.