Evolution Flashcards
(14 cards)
Natural selection
Process that results when characteristics of a population change over many generations.
Individuals in a population have specific traits allowing survival—traits r passed to next generation
Natural selection….
Is situational. Has no will purpose or direction.
Trait may be useless at one point but at another key to survival—gets passed on
Selective pressure
Environmental conditions selects for certain traits.
Artificial selection
Selective pressure by humans on population in order to improve or modify desirable traits
George-Louis Leclere
Suggested species change overtime after noticing similarities in apes and humans.
George Cuvier
Developed palaeontology-studying fossils
Found each stratum is characterized by unique group of fossil species. Deeper stratums had were more dissimilar than modern day
Charles Lyell
Proposed uniformitarianism
Theorized that slow subtle processes happen over long periods
Jean-Baptist’s Lamarck
Compared current species to fossil species and observed idea of line of descent
Charles Darwin
Observed natural selection of finches
Catastrophism
Idea that catastrophes destroyed species in region making room for another to repopulate
Uniformitarianism
Theory that geological processes operated at same rate in that past as they do now
Structural adaption
Resembling harmful species to avoid predators
Camouflage and mimicry
Behavioural adaption
Migration and mating calls
Physiological adaption
Hibernation and frogs with antifreeze
