Unit 7 Flashcards
what is evolution
The change in inherited characteristics of biological population over successive generations
what do organisms who survive and have offspring pass on
traits
what did lyell and Hutton state
that the process that shaped the earth in the past continues today (volcano, erosion)
what area of evolution did Charles Lyell focus on
geology
what area of evolution did jean Baptiste lamrk focus on
acquired traits
what process takes millions of years to acomplish
the evolution of geology
what did lamark dicover
traits are selective in the use of disuse of organs, an organism slowly acquired or lost certain traits during its lifetime that would be passed on to offspring
what was the boat that charles darwin traveled on
HMS beagle
what is species modification
similar species arose from a common ancestor
species vary locally
Galapagos tortoises are related but different depending on the habitat occupied
species vary globally
convergent evolution of rheas in south America; emus in Australia; ostriches in Africa in similar habitats
species vary over time
glyptodon vs armadillo fossils of extinct animals were similar to living species
what exactly is evolution
any change in any trait within a population over generation
when does evolution usually happen
with DNA mutations or combining of genes
dogs came from selected genes in what
wolves
what is natural selection
evolution without the help of a breeder
what is all life on earth
related
decent with modificaiton
evolution occurs newer forms are decedents of older species all species are descended from one or a few origination types of life.
modification by natural selection
evolution occurs due to beneficial DNA changes (adaptations) that are random (survival of the fittest)
what is the first fact about population
more offspring are produced than can possibly survive
what is the second fact about population
traits vary amongst individuals, leading to different rates of survival and reproduction
what is the third fact about populations
trait differences are heritable when members of a population die they are replaced by the progeny of parents that were better adapted to survive and reproduce in the current environment
homologous body structure
structures that have different mature forms in fdifferent organisms but develop from the same embryonic tissue
adaptive radiation
a process in which organisms diversity rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, creates new challenges or opens new environment riches
