Diversity And Natural Selection Question Preview (ID: 41667)
Review For Unit 7.
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Which of the following statements best describes why birds are one of the only descendants of the dinosaurs that live today?
a) Bird’s ancestors were able to adapt to the environmental changes that caused the extinction of the dinosaurs
b) Bird are able to fly, dinosaurs could not
c) Bird feathers act as a better shield against the environmental changes than dinosaurs skin
d) The statement is false birds are descendants of dinosaurs
Which of these statements best describes what Charles Darwin observed on the Galápagos Islands?
a) The finches on the islands ate seeds and nuts but no insects.
b) The finches on the islands were the same as the finches in Ecuador.
c) The finch population on each island was unique.
d) The finches could produce offspring only with finches from other islands.
2. Define adaptations.
a) An inherited trait that increases an organism’s chance of surviving and reproducing in its environment.
b) The resemblance of one species to another.
c) The breeding of organisms for desired characteristics.
d) A slight difference in a species.
Define natural selection.
a) An inherited trait that increases an organism’s chance of surviving and reproducing in its environment.
b) A slight difference in an inherited trait of individual members of a species.
c) A person who studies nature selectively.
d) Organisms with variations that help them survive in their environment, live longer, and go on to reproduce.
Which is not a cause of variations to arise in a population?
a) changes in the environment
b) competition for limited resources
c) random mutations in genes
d) rapid population increases
Which of these answers correctly pairs a scientific discovery with the type of evidence for evolution that it represents?
a) DNA comparison, embryological evidence
b) fossilized bones, genetic evidence
c) unused hind limbs, structural evidence
d) developmental patterns, fossil evidence
Which of the following do some scientists believe shows evidence for evolution in living species?
a) homologous structures
b) vestigial structures
c) analogous structures
d) all of the these
____ are remains of life from an earlier time.
a) sedimentary rocks
b) variations
c) fossils
d) dlimestones
Which animal would you expect a dog’s genes and proteins to be the most like?
a) wolf
b) alligator
c) bear
d) lion
A scientist described two modern-day species as sharing a common ancestor. What does it mean when two species share a common ancestor?
a) It means that the two species are actually the same species.
b) It means that one of the species evolved from other species.
c) It means that both species evolved from one species that lived in the past.
d) It means that the two species share all the same traits.
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