Exam 12: Processes Of Evolution

When a physical barrier separates a population,leading to the evolution of new species on either side of the barrier,____ has occurred.

The movement of alleles among populations is called _____.

Natural selection in the cichlid fish species of Lake Victoria occurred via ____.

____ is the study of a species' evolutionary history.

In the work that they do,scientists who study phylogeny are most like a ____.

The use of phylogeny to determine evolutionary relationships has practical applications in ____.

The preference of female cichlid fish for brightly colored blue or red males in Lake Victoria provides an example of ____.

A female horse can mate with a male donkey but they will produce a mule that is sterile.This is an example of what type of isolation mechanism?  

Which is an example of macroevolution?  

The branch points on a cladogram represent ____.

The emergence of hundreds of Hawaiian honeycreeper species from a single flock introduced to this island archipelago millions of years ago is an example of ____.

The migratory patterns of many animals encourage ____.

A random change in allele frequency over time that is brought about by chance alone is known as ____.

One hallmark of speciation is ____.

For each statement, select the genetic evolutionary concept that best represents the description. -When a small group of individuals found a new population,allele frequencies in the descendants differ from those in the original population.

In Cameroon,seedcrackers have either small bills (adapted for feeding on soft sedge seeds)or large bills (adapted for feeding on hard sedge seeds).During competition for scarce resources,these birds primarily feed on the seeds for which they are best adapted.This is an example of ____ selection.

An allele's abundance within a population is referred to as ____ frequency.

For each statement, select the best choice that represents the description given. -evolutionary tree diagram that shows hypothesized of evolutionary relationships among a group of clades

In sexually reproducing species,genetic variations are not passed onto offspring via ____.

-distribution of traits in a population before selection occurs