Who Wants to Be a Millionaire? Template by Bill Arcuri, WCSD

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What did Darwin infer from his observations of organisms in South America and the Galápagos Islands? 50/50 A small number of different plant and animal species had come to the Galápagos Islands from the mainland. The organisms on the Galápagos Islands were completely unrelated to mainland organisms. A B The organisms on the Galápagos Islands were virtually identical to mainland organisms. A small number of different plant and animal species had come to the mainland from the Galápagos Islands. C D Template by Bill Arcuri, WCSD

Differences between members of the same species are called… 50/50 traits selections A B predators variations C D Template by Bill Arcuri, WCSD

Darwin concluded that organisms on the Galápagos Islands… 50/50 had no variations had remained the same A B had changed over time were the result of selective breeding C D Template by Bill Arcuri, WCSD

Which of these is one of the main ways that a new species forms? 50/50 Competition occurs between members of the species Mutations occur in the alleles of members of the species A B A group is separated from the rest of the species Cross-breeding occurs within the species C D Template by Bill Arcuri, WCSD

What are fossils? 50/50 molds and casts of organisms that live today the preserved remains or traces of organisms that lived in the past A B footprints or burrows of small animals that live today drawings of ancient animals and other organisms C D Template by Bill Arcuri, WCSD

A trait that helps an organism survive and reproduce is called a(n)… 50/50 variation selection A B mutation adaptation C D Template by Bill Arcuri, WCSD

What is the role of genes in evolution? 50/50 Parents with recessive genes die from overpopulation Natural selection happens regardless of genes A B Only traits that are controlled by genes can be acted on by natural selection The genes of most surviving parents have only dominant alleles C D Template by Bill Arcuri, WCSD

punctuated equilibria homologous structures developmental organisms Which term refers to similar structures that related species have inherited from a common ancestor? 50/50 punctuated equilibria homologous structures A B developmental organisms DNA sequences C D Template by Bill Arcuri, WCSD

If two organisms look very similar during their early stages of development, this is evidence that the organisms… 50/50 evolved from different ancestors are not related A B have exactly the same DNA evolved from a common ancestor C D Template by Bill Arcuri, WCSD

A branching tree is… 50/50 A B C D A diagram showing how scientists think different groups of organisms are related a drawing that shows where different animals live in a tree A B a homologous structure that many plants have a species of tree that is not closely related to other tree species C D Template by Bill Arcuri, WCSD

Scientists combine evidence from fossils, body structures, early development, DNA, and protein structures to… 50/50 determine whether an organism will have gills during its early development determine the evolutionary relationships among species A B determine what bones an animal has in its forelimbs decide which fossils are older than others C D Template by Bill Arcuri, WCSD

What did Darwin observe about finches in the Galápagos Islands? 50/50 Their feathers were adapted to match their environment They had identical genotypes in all locations A B They had identical phenotypes in all locations Their beaks were adaptations related to the foods the finches ate. C D Template by Bill Arcuri, WCSD

A species is a group of similar organisms that… 50/50 can mate with each other and produce fertile offspring can migrate to an island from the mainland A B can live together on an island all have exactly the same traits C D Template by Bill Arcuri, WCSD

The gradual change in a species over time is called… 50/50 mutation evolution A B migration variation C D Template by Bill Arcuri, WCSD

What evidence suggests that the ancestors of whales once walked on land? 50/50 Scientists have found fossils of whale-like creatures that had legs Whales have similar DNA to elephants A B Whales perform walking motions as they swim Whales breathe through lungs C D Template by Bill Arcuri, WCSD