Question 1

Which of the following best describes the Biological Species Concept (BSC)?

Accepted Answer

A group of individuals capable of interbreeding and producing viable, fertile offspring.

Question 2

Which of the following is a limitation of the Biological Species Concept?

Accepted Answer

It cannot be applied to asexually reproducing species.

Question 3

A population of squirrels is separated by the formation of a canyon, and over time, the two groups evolve into distinct species. What type of speciation is this?

Accepted Answer

Allopatric speciation

Question 4

Which of the following is an example of pre-zygotic reproductive isolation?

Accepted Answer

Gametes from different species fail to fuse

Question 5

Which scenario best illustrates behavioral isolation?

Accepted Answer

Two bird species have different mating dances and do not recognize each other as mates.

Question 6

Which of the following is an example of post-zygotic reproductive isolation?

Accepted Answer

A horse and a donkey produce a sterile mule.

Question 7

Which of the following best describes adaptive radiation?

Accepted Answer

The rapid diversification of a common ancestor into many new species.

Question 8

Which of the following is a real-world example of artificial selection?

Accepted Answer

The genetic similarity between wolves and domestic dogs due to selective breeding.

Question 9

Which of the following is NOT a pre-zygotic barrier to reproduction?

Accepted Answer

Reduced hybrid fertility

Question 10

Which evolutionary model is characterized by long periods of little change interrupted by brief periods of rapid speciation?

Accepted Answer

Punctuated equilibrium

Question 11

A population of plants forms a new species in a single generation due to a doubling of chromosome number. What is this process called?

Accepted Answer

Polyploidy

Question 12

Which of the following best explains why the Biological Species Concept cannot be applied to fossilized organisms?

Accepted Answer

Fossilized organisms cannot be observed mating.

Question 13

Which of the following is the correct order of taxonomic classification from broadest to most specific?

Accepted Answer

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

Question 14

Female North American house finches prefer to mate with colorful males, who also have higher overwinter survivorship. Which evolutionary concept best explains this phenomenon?

Accepted Answer

Sexual selection

Question 15

Which of the following is an example of temporal isolation?

Accepted Answer

Two species of frogs breed in different seasons.

Question 16

Which of the following scenarios would most likely result in sympatric speciation?

Accepted Answer

A mutation causes a subset of plants to become polyploid within the same field.

Question 17

Which of the following best describes stabilizing selection?

Accepted Answer

Selection favors individuals with intermediate traits.

Question 18

Which of the following is a real-world example of hybrid breakdown?

Accepted Answer

Cultivated rice plants produce fertile hybrids in the first generation, but later generations are weak or sterile.

Question 19

Which of the following statements about gradualism and punctuated equilibrium is correct?

Accepted Answer

Punctuated equilibrium suggests evolution occurs in rapid bursts followed by long periods of stability.

Question 20

Which of the following is an example of disruptive selection?

Accepted Answer

Selection favors both small and large beak sizes, but not intermediate sizes.

Speciation and the Formation of New Species

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