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15 Cards in this Set

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  • Back
Adaptation
characteristic that helps an organism survive and reproduce in its' evironment
Species
group of organisms that can mate with one another to produce fertile offspring
population
groups of individuals of the same species living in the same place
evolution
process in which populations gradualy change over time
sediments
particles of sand, dust or soil that are depositedin an orderly fashion to form earth's layers
fossils
remains or imprints of once-living organisms found in layers of rock
The Fossil Record
timeline of life indicated by fossils
Camparisons of modern whales and large numbers of fossils have supported the hypothesis of what?
that their ancient ancestors lived on land and could run
Similarities of which animals suggest that they had a common ancestor?
human, cat, dolphin, and bats
naturalist
scientist who studies nature
What limits humans to reproduce rapidly?
starvation, disease,competition, predation
natural selection
process by which organisms are better adapted to their environment; survive and reproduce more sucessfully than less well adapted organisms.
why does variation happen? (Darwin's missing evidence)
as a result of differences in genes
what might happen while producing offspring (Darwin's missing evidence)
changes in genes
some genes make organsims more likely to what? (Darwins missing evidence)
reproduce