Allopatric and Sympatric Speciation

Which of the following is required for a population to diverge into two separate species?

• The two populations must have evolved different physical appearances.

• The two populations must have mutated at least 10 times.

• The two populations must have become reproductively isolated.

• The two populations must have evolved analogous structures.

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The palmarus longus tendon, pictured here, no longer serves a purpose in humans, but provides evidence of our species descendance from tree-dwelling ancestors. The palmarus longus tendon is an example of:

• a vestigial structure

• a homologous structure

• bipedalism

• convergent evolution

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Which of the following means "genetic changes in a species over time"

• natural selection

• speciation

• evolution

• fitness

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A new river forms and splits two populations, causing ______________ speciation

• Sympatric

• Allopatric

• Extreme

• Convergent

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A speciation in which new species evolve from a single ancestral species while inhabiting the SAME geographic region.

• Sympatric speciation

• Allopatric speciation

• Complex speciation

• Divergent speciation

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The emergence of new rivers or streams is a type of ____________ isolation.

• Temporal

• Mechanical

• Behavioral

• Geographic

Which are causes of speciation? Choose all that apply

• Isolation caused by mountains, rivers and man-made structures

• preference for different foods

• change in environment

• different mating behaviors

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Speciation that caused by breeding occurring at different time of the day is called

• behavioral isolation

• temporal isolation

• ecological isolation

• habitat isolation

Which is necessary for speciation to occur?

• adaptation
• mass extinction
• isolation
• acquired traits

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The evolution of a new species from an existing species is ____.

• natural selection
• isolation
• speciation
• genetic variation

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