Ch. 22-26 Quiz Flashcards
viewed species as fixed; proposed that life forms could be arranged on a ladder of increasing complexity
Aristotle
tried to classify life’s diversity using a binomial naming system
Linnaeus
believed that mechanisms of change are constant over time (uniformitarianism)
Lyell
Had two incorrect ideas about evolution: (Use and disuse) believed body parts survive based on how often they are used; (inheritance of acquired characteristics) an organism can pass these modifications to its offspring
LaMarck
developed paleontology; used catastrophism principle to explain why some animals aren’t in every layer
Cuvier
hypothesized that the earth’s atmosphere was a reducing (electron adding) environment where organic compounds could have formed from simple molecules
Oparin and Haldane
created lab conditions thought to be comparable to those they thought existed on early Earth to test Oparin and Haldane’s hypothesis; made amino acids but different from those found in living organisms
Miller and Urey
block fertilization from occurring; isolation (habitat, temporal, behavior, mechanical, gametic)
prezygotic barriers
decreases chances of survival or passing of traits to offspring; reduces hybrid viability and fertility and increases hybrid breakdown (infertile offspring)
postzygotic barriers
4.6 billion years to 2.5 billion years ago
Archaean
2.5 billion yrs to .6 billion years ago
Proterozoic
.6 to .3 billion years ago
Paleozoic
.3 to .1 billion yrs ago
Mesozoic
said descent with modification explains life’s unity and diversity; believed natural selection brings about the match between organisms and the environment; wrote The Origin of Species
Darwin