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Descriptions of new species of insects are more likely to contain diagrams of the shape of the male genitalia than head,wing,or leg parts.Why?


A) This is where mutations usually express themselves in animals.
B) Radiation damage to genes usually occurs in genitalia.
C) Small changes in the genitalia cause reproductive isolation while a single species can tolerate wider variation in head,wing,and leg morphology.
D) Arthropods have hard exoskeletons so head,wing,and leg structures can't vary as much.
E) This is the convention or custom of entomology.

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

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Male birds often perform a special dance or set of physical displays to attract females.This would be an example of a behavioral isolation mechanism.

A) True
B) False

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Plant species A has a diploid number of 28 chromosomes,while Plant species B has a diploid number of 14 chromosomes.Species A and B produce a hybrid through alloploidy.The diploid number of chromosomes of the hybrid is


A) 28.
B) 14.
C) 42.
D) 21.

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

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Animal diversity is due to variations in the expression of ancient genes in addition to the evolution of new and different genes.

A) True
B) False

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Evolutionary change above the species level is referred to as ________,whereas evolutionary change below the species level is known as ________.


A) convergent; divergent
B) macroevolution; microevolution
C) microevolution; macroevolution
D) punctuated; gradualistic

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

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Several species of Caribbean Anoline lizards have evolved from a single ancestral species.The species occupies a wide variety of ecological niches,such as tree trunks and the ground,or tree trunks only,or tree trunks and the crown of trees,etc.This type of allopatric speciation is called


A) adaptive radiation.
B) alloploidy.
C) autoploidy.
D) hybridization.

E) A) and D)
F) A) and C)

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The Greek root words meaning "together" and "fatherland" are the basis for the term


A) prezygotic.
B) adaptive radiation.
C) speciation.
D) allopatric.
E) sympatric.

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

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The biological species concept relies mainly on ________ to define a species.


A) reproductive isolation
B) morphological differences
C) the presence of analogous traits
D) comparative biochemical analysis

E) A) and B)
F) All of the above

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The biological species concept is limited,and may not be applied to


A) asexually reproducing organisms.
B) organisms known only in the fossil record.
C) species that could possibly interbreed if they lived near one another.
D) All of the answer choices are correct.

E) A) and B)
F) All of the above

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Once members of a species are geographically isolated,what factors may cause them to differ from each other over time?


A) natural selection
B) genetic drift
C) new mutations
D) sexual selection
E) All of the above are correct.

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

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What type of scientist classifies organisms into groups?


A) geneticist
B) taxonomist
C) zoologist
D) botanist
E) embryologist

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

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Compare the key differences between microevolution and macroevolution.

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Answers may vary but should include the ...

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Why is the use of morphological traits to distinguish species considered to be a disadvantage?

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The use of morphological traits to disti...

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The process in which natural selection favors the continual development of prezygotic isolating mechanisms is called


A) disruptive selection.
B) sympatric speciation.
C) mutation.
D) reinforcement.

E) B) and D)
F) A) and D)

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Which of the following examples is best explained by the process of convergent evolution?


A) The wings of birds and butterflies being used for flight.
B) Both mice and rats having a tail.
C) Wolves and coyotes both producing milk for their young.
D) A human cell and a fruit fly cell both going through the process of transcription and translation in order to produce a gene.

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

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