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Evolution

7th Grade Evolution

QuestionAnswer
adaptation a characteristic that helps an organism survive and reproduce in its environment
species a group of organisms that can mate with one another to produce fertile offspring
evolution the process by which populations accumulate inherited changes over time
fossil solidified remains or imprints of a once-living organism plate tectonics
fossil record fossils that provide a historical sequence of life
trait a quality that can be passed on from 1 generation to another
selective breeding breeding of organisms that have a certain desired trait
natural selection process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without the favorable trait
mutation a change in the order of the bases of DNA
speciation process by which 2 populations of the same species become so different that they can no longer interbreed
extinct a species of organism that has died out completely
What are the 3 ways you can compare organisms? skeletal structures, DNA and the embryonic structures
What kind of rock are fossils found in? sedimentary rock 3 types of rock
Who made observation that later became the foundations for his theory of evolution by natural selection? Charles Darwin
relative dating ordering fossils to estimate their age
absolute dating the method of measuring the ratio of unstable atoms to stable atoms, which help determine the approximate age of a fossil
geologic time scale the calendar scientists use to outline the history of life on earth
Pangaea a single large landmass of the earth
What are some possible forces that cause the Earth's crust to move? volcanic eruptions and earthquakes
Created by: Bshiffman
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