Which best explains why the finches on the Galapagos Islands have differences in beak size and shape?, evolution, asexual reproduction, lack of competition, Which scientist observed finches on the Galapagos Islands and came up the idea that species change over time?, Gregor Mendel, Charles Darwin, Carolus Linneaus, Which best describes the fossil layers or fossil record?, newer fossils are found in the bottom layers of rock, all fossils were formed at the same time, older fossils are found in the bottom layers of rock, What do scientists compare to determine how closely related organisms are, Parents, DNA base pair sequence, Facial features, Which ship did Charles Darwin travel on to the Galapagos?, HMS Finch, HMS Puppy, HMS Beagle, Which best describes natural selection?, smaller organisms are eaten by larger organisms, organisms that are better adapted to the environment survive and reproduce, organisms that are bigger and stronger can out compete all other organisms, Which is used to describe accidental or random changes in DNA that can lead to new adaptations?, recombinant DNA, gene therapy, Mutation, Why do organisms produce more offspring than can survive?, it decreases the chance that they will survive, so that every organism is able to reproduce once in its lifetime, it increases the chance that the whole species will survive. (better traits will be passed on), Which of the following provides the best source of variation, leading to new genes being added to a population?, Competition, Migration, Mutation, Which describes how species may change over time through natural selection and isolation until they are a completely new species (meaning they can no longer mate with that group)., speciation, mutation, competition, What process produces the most variation within a species?, asexual reproduction, sexual reproduction, mitosis, The use of pesticides on crops has been a common farming practice for decades. What has been the greatest effect of natural selection through the use of pesticides on certain insect populations?, Natural selection has been altered because the insects and their predators are killed, The rate of selection is increased because the pesticide does not kill the insects that are naturally resistant to it., The rate of selection has decreased because the pesticides kill only young insects..

Evolution Review

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