On an island off the coast of Australia, differences in floweringtime result in the reproductive isolation of two species of closelyrelated palm.Finches colonized the Galapagos Islands only once. Within asingle island, many species are derived from a singlecolonizing species.During the last Ice Age, pupfish inhabited large lakes in theSouthwestern United States. As these lakes dried, pupfishbecame isolated in small lakes.Meadowlarks, which are found across the United States, aredivided into Western and Eastern species. The two species aresimilar, but behavioral barriers discourage matingbetween species.The Bering Sea land bridge once united Alaska and Russia.Mammals, such as caribou, traveled across this bridge until sealevels rose and flooded it.Giraffes live across the African continent. Differences in thecoat pattern may discourage breeding between northern andsouthern populations. Each of the examples describes either a speciation eventor potential speciation event. Place each scenario underallopatric, parapatric, or sympatric speciation.AllopatricspeciationParapatricspeciationSympatricspeciation

BASIC INFORMATION SPECIATION It is the process in which new are evolved from the species which…

Each of the examples describes either a speciation event or potential speciation event. Place each scenario under allopatric, parapatric, or sympatric speciation. Allopatric speciation Parapatric speciation Sympatric speciation

Each of the examples describes either a speciation event or potential speciation event. Place each scenario under allopatric, parapatric, or sympatric speciation. Allopatric speciation Parapatric speciation Sympatric speciation

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter18: Evolution And The Origin Of Species

Section: Chapter Questions

Problem 3VCQ: Figure 18.23 Which of the following statements is false? Punctuated equilibrium is most likely to...

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Concept explainers

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.

Question

On an island off the coast of Australia, differences in flowering
time result in the reproductive isolation of two species of closely
related palm.
Finches colonized the Galapagos Islands only once. Within a
single island, many species are derived from a single
colonizing species.
During the last Ice Age, pupfish inhabited large lakes in the
Southwestern United States. As these lakes dried, pupfish
became isolated in small lakes.
Meadowlarks, which are found across the United States, are
divided into Western and Eastern species. The two species are
similar, but behavioral barriers discourage mating
between species.
The Bering Sea land bridge once united Alaska and Russia.
Mammals, such as caribou, traveled across this bridge until sea
levels rose and flooded it.
Giraffes live across the African continent. Differences in the
coat pattern may discourage breeding between northern and
southern populations.

Each of the examples describes either a speciation event
or potential speciation event. Place each scenario under
allopatric, parapatric, or sympatric speciation.
Allopatric
speciation
Parapatric
speciation
Sympatric
speciation

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