EOC Biology

___ are mistakes in the DNA that cause variation within a species.

• mutations

• adaptations

• speciations

• isolations

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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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Organisms with the most beneficial traits will survive.  This is commonly known as ___.

• theory of evolution

• variations
  

• survival of the fittest

• ecosystems
  

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Most organisms have more offspring than will survive 

• True

• False

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

• Sympatric

• Allopatric

• Extreme

• Convergent

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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A bumble bee has just enough weight to open up the snapdragon flower and get the nectar/pollen inside.  Other insects cannot do this. This adaption is an example of........

• convergent evolution

• co-evolution

• divergent evolution

• speciation

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

• Temporal

• Mechanical

• Behavioral

• Geographic

What is a mass extinction?

• When all the species in a particular area on earth suddenly go extinct

• When multiple species from all over the earth suddenly go extinct 

• When one species goes extinct due to habitat changes

• When all life on earth is wiped out 

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To be a species, a group of organisms must be able to ...

• experience gene flow.

• interbreed.

• produce infertile offspring.

• move and breathe oxygen.