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Which fossil evidence is considered an intermediate between reptiles and birds?


A) Archaeopteryx
B) Eusthenopteron
C) Seymouria
D) synapsids
E) therapods

F) D) and E)
G) A) and E)

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Inbreeding within a population is an example of


A) mutations.
B) genetic drift.
C) gene flow.
D) nonrandom mating.
E) natural selection.

F) None of the above
G) B) and E)

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Different species of female fireflies flash different patterns during mating season.This is an example of _________ isolation.


A) postzygotic isolation
B) temporal isolation
C) behavioral isolation
D) habitat isolation
E) mechanical isolation

F) D) and E)
G) C) and D)

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A variety of genotypes and phenotypes in a population is useful because it


A) makes life more interesting.
B) allows the species to survive if the environment changes.
C) means that the gene pool is constant and unchanging.
D) makes genetic drift an unlikely occurrence.
E) will lead to nonrandom mating.

F) C) and E)
G) All of the above

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What evidence would NOT be studied by a biogeographer?


A) continental drift or the movement of tectonic plates over time
B) amount of genetic similarity among current populations
C) ocean currents and wind patterns
D) ranges of animals and ability to migrate
E) the genetic makeup of organisms that evolved in separate but similar conditions

F) B) and E)
G) A) and E)

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A student proposes that left-handedness is a recessive trait that is therefore hidden in much of the human population.A survey of a class of 36 students finds that 27 (0.75) are right-handed and 9 (0.25) are left-handed.Using the Hardy-Weinberg formula,what would the expected genotype and allele frequencies be in this theoretical population?


A) 0.75 right-handed homozygous dominant and 0.25 recessive homozygous for 3-to-1 right- to left-handed alleles in the population
B) 0.25 right-handed homozygous,0.50 heterozygous,and 0.25 recessive homozygous for a 3-to-1 right- to left-handed alleles in the population
C) 0.25 right-handed homozygous,0.50 heterozygous,and 0.25 recessive homozygous for a 0.5 allele frequency for each allele
D) 0.50 right-handed homozygous,0.25 heterozygous,and 0.25 recessive homozygous for a 0.5 allele frequency for each allele
E) They cannot be estimated using these limited data.

F) A) and B)
G) B) and D)

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If the frequency of the dominant gene is 0.7,what is the frequency of the recessive gene?


A) also 0.7
B) 0.49 or (0.07) 2
C) approximately 0.27 (square root of 0.7)
D) 0.3 (or 1.00 - 0.7)
E) 0.14

F) A) and E)
G) B) and E)

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The observation by ________ that human reproductive potential would rapidly outstrip available food and living space was an important concept adopted by Darwin in formulating his theory of natural selection.


A) Stanley Miller
B) Graham Cairns-Smith
C) Thomas Malthus
D) Aleksandr Oparin
E) Sidney Fox

F) None of the above
G) A) and B)

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Within the field of systematic biology scientists use the characteristics of living and fossil organisms to infer the evolutionary relationships among organisms.

A) True
B) False

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Which evidence for evolution uses impressions of plants and animals pressed into sedimentary rock?


A) fossil record
B) biogeography
C) comparative anatomy
D) comparative embryology
E) comparative biochemistry

F) B) and D)
G) C) and E)

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Almost all living organisms use DNA,ATP,and the same DNA triplet code.This is an example of evolution based on


A) the fossil record.
B) biogeography.
C) comparative anatomy.
D) comparative embryology.
E) biochemistry.

F) None of the above
G) A) and C)

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Prokaryotic cells are represented by fossils that are dated back as far as _____ billion years ago.


A) 1.5
B) 2.5
C) 3.5
D) 4.5
E) 10

F) B) and D)
G) A) and B)

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Movement of alleles between populations such as by the migration of breeding individuals is called


A) mutations.
B) genetic drift.
C) gene flow.
D) nonrandom mating.
E) natural selection.

F) A) and B)
G) A) and C)

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According to Lamarck,which variable would have the greatest influence on the evolution of an organism?


A) the environment
B) the genetics of the individual
C) Both the environment and genetics are equally responsible for the evolution of an organism.
D) Neither the environment nor the genetics of an organism play a role in its evolution.
E) A creator would determine the evolution of an organism.

F) B) and D)
G) C) and D)

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Once a true cell was formed,biological evolution began.Biological evolution is all the changes that have occurred in living things since the beginning of life due to differential reproductive success.This means that


A) living things have been evolving toward the perfect form.
B) living things have begun reproducing.
C) living things have all evolved from a common ancestor.
D) life has recently begun to change through evolutionary processes.
E) life has evolved to become increasingly complex.

F) None of the above
G) A) and D)

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The three-domain system is primarily based on


A) molecular data showing eukaryotes are much more closely related than previously thought.
B) structural data showing eukaryotes are far more diverse than previously thought.
C) molecular data showing prokaryotes are far more diverse than previously thought.
D) new biogeographical data showing prokaryotes are far more diverse than previously thought.
E) new classification concepts that have shown everything except molecular data to be irrelevant.

F) B) and D)
G) A) and D)

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Which piece of evidence did Darwin observe during his 5-year journey aboard the HMS Beagle?


A) A South American species of finch is most likely the ancestor of the Galápagos Island finches.
B) Species do not change over time.
C) The environment can bring about inherited change in an individual.
D) All species share the same basic genetic and molecular makeup.
E) The earth is approximately 4.6 billion years old.

F) None of the above
G) B) and E)

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Social research indicates that a person is most likely to marry someone from the same village or city,or a high school or college classmate.Therefore,the Hardy-Weinberg equilibrium does not apply well to human populations because


A) allelic changes in one direction are balanced by changes in the opposite direction.
B) there is no directional trend in selection of mates since most individuals marry someone.
C) individuals are not pairing up by chance across the whole population,and genetic drift is more likely to change gene frequencies.
D) this increases gene flow.
E) we accumulate adaptive traits that improve the population.

F) C) and D)
G) A) and D)

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Mass extinctions


A) are the result of humans damaging the natural environment.
B) are the result of humans exploiting wildlife and using pesticides.
C) occurred in cycles when organisms fail to evolve.
D) have occurred about 4 or 5 times in fossil record,due in some cases to catastrophic changes.
E) require life to evolve again from protocells.

F) A) and D)
G) B) and C)

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When he arrived at the Galápagos Islands,Darwin did not observe the amazing tool-using "woodpecker finch" that can modify twigs to pry out grubs.Because there are no true woodpeckers on the Galápagos Islands,this behavior allows this finch to exploit an untapped food source.However,not all members of this species exhibit this behavior,which is probably learned from watching other finches.Therefore,which of the following is NOT true?


A) Young isolated at hatching will not know how to do this.
B) It is probably not "hardwired" in the brain as a behavior passed on genetically.
C) There must be a great advantage to reaching this food source for this learned behavior to be repeated by most descendants each generation.
D) As an acquired characteristic,in a strict sense this is not part of the adaptive radiation of finches on the Galápagos.
E) This "learned" behavior will not lead to evolutionary change in the woodpecker population.

F) B) and E)
G) A) and E)

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