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33 Cards in this Set

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evolution:
all of the changes that have transformed life over an immense time
adaptation:
an inherited chararistic that improves an organisms ability to survive and reproduce in a particular envirement.
descent with modification:
when animals accullmulate different modifications, or adaptations, to diverse ways of life
natural selection:
the process by which individuals with inherited chararistics well-suited to their envirorement leave more offspring on average than do other individuals
summarize ideas from Darwins time that influenced his work
Lamerack and Buffon were to scientists who came up with ideas that Darwin used to start his work
identify some key observations from Darwins voyage that led to his theory
Darwin found different "versions" of the same species living in relatively close areas.
fossil:
markings left by organisms that lived in the past
fossil record:
the chronological collection of lifes remains in rock remains
extinct:
species that no longer extinct
homologous structure:
similar structers in species sharing a common ancester
vestigial structure:
structers that had a function in a previous organism but have no function in the current one
describe information the fossil revord contains about life on Earth
it shows the different time periods that different organisms lived and lets us compare them
tell how the geographic distribution of organisms relates to evolution
it shows that some organisms are older than others and lets us tell about when life began
explain how similarites in structere and developement among different species are evidence for evolution
it shows which species evolved from the same ancester
describe moleclear evedence for evolution
the genes that match closely in different species show that those species are related
population:
a group of individuals of the same species living in the same area at the same time
variation:
differences among members of the same species
artificial selection:
selective breeding of plants and animals to produce offspring with wanted chararistics
summarize Darwins theory of natural selection
Darwins theory is that individuals within a population that have inherited chararistics that are well suited to their envirement will reproduce, on average, more often than others
compare and contrast artificial selection with natural selection
artificial selection is breeding two animals for a specific chararistic, while natural selection slowly gets them all
relate pesticide resistance to insects to natural selections
pesticide resistance is an inherited chararistic. and should be considered as part of natural selection
gene pool:
consists of all the alleles in the individuals that make up a population
microevolution:
evolution on a small scale
Hardy-Wienburg equilibrium:
when populations that do not undergo change to their gene pools then they are not presently evolving
genetic drift:
a change in the gene pool of a population due to chance
gene flow:
the exchange of genes with another population
fitness:
the contribution an induvidual makes to the gene pool of individuals
Explain the significance of gene pools in understanding evolution
when the gene pool changes scientists can see the evolutionary changes to the population
explain what is meant by the term fitness
when an organism reproduces it is adding to the gene pool through their offspring
antibiotic:
a medicine that slows or stops the growth of a virus
explain how natural selection causes the sickle cell allele to persist in some gene pools
having one of the genes to stop malaria is okay, but having two results in sickle cell deasease, and the malaria resistant gene is frequent in areas that have malaria commonly.
antibiotic:
a medicine that slows or stops the growth of a virus
explain how natural selection causes the sickle cell allele to persist in some gene pools
having one of the genes to stop malaria is okay, but having two results in sickle cell deasease, and the malaria resistant gene is frequent in areas that have malaria commonly.