chapter 15-17 test Flashcards
what influenced Darwin the most out of beagle sports
Galapagos Islands
Evolution
process by which modern organisms descended from ancient organisms
how did the birds differ on the Galapagos Islands
your beaks
after you return to England what darling developed to explain his findings
Siri saying that species evolve differently when separated
how did Lamarack propose the species change
selective use or disuse use of organs, organisms gain or lose traits
variation
Differences among individuals or species
artificial selection
nature provided the variation among organisms, human selected yousfull ones
what was Darwin’s greatest contribution
prosses in nature to artificial selection
fitness
The ability of an individual to survive and reproduce in its specific environment
adaptation
any inherited characteristic that increases and organisms chance of survival
natural selection
revival of the fittest
explain what Darling meant by the phrase survival of the fittest
individuals more suited to their environment have a better chance of surviving
three facts about natural selection
changes in inheritance, increases fitness, takes many generations
common descent
common ancestors of all living things
what four areas is evidence for evolution found
fossil record, geographic distribution, Homo largest body structures, similarities in early development
Homo Logis structures
different mature forms, same embryonic tissues
what happens to individuals whose characteristics are not well-suited for their environment
they die or leaf you were off springs
paleontologist
scientists who study fossils
fossil record
produces evidence about history and life on earth, how organisms change over time
what are the two techniques that paleontologist used to determine the age of fossils
realitive dating and radioactive dating
how is the age of a fossil determined in realitive dating
comparing its placement with fossils and other layers
half-life
length of time required for half of the radioactive Adams in a sample to decay
precambrian
88% of earths history
Cenozoic
age of mammals
meza zoic
age of dinosaurs
what gas is made up earths early atmosphete
hydrogen cyanide, carbon dioxide, carbon monoxide it, hydrogen sulfide, nitrogen, water
why did oceans not exist until nearly 3 .8 billion years ago
The service wasn’t cool enough
