Topic 2 Bio 108 Flashcards
Jean Baptist Lamarck theory
Tendency towards progression, spontaneous generation
The weird giraffe theory
Charles Darwin “on the origin of species” key points
Populations overproduce Populations tend to remain stable in sizE Resources are limited Individuals vary within populations Variation is inherited
Homologies
Structures are share due to shared ancestors
Animals having some of the same bone structure
Increased complexity is not always…
Advantageous
Example blind cave fish used to be fish with eyes up near the surface of the water but now they have moved down into dark water now they don’t have eyes
Co evolution
Two different species can evolve together where one species will become dependent on the other
Example particular flowers that can only be pollinated by a particular wasp
Artificial selection
Taking traits that are favourable of two species or more to create a more ideal crossbreed
Sexual selection
Occurs when there is competition for mates certain traits give a competitive edge or a favoured by opposite sex and make reproduction more likely
Palaeontology
Fossil record
Vestigial organs
Remnant of body parts
Example anal spurs is a remnant of legs snakes involved from animals with legs
Natural selection
Dissent with modification
Carlos Linnaeus
Big contributor to taxonomic nomenclature
Creationism
Believe that the earth is very young and that all life is created in its present form
