Exam 12: Processes of Evolution

Individuals, such as veterinarians, who work closely with farm animals treated with antibiotics tend to carry ____ as a result.

A cladogram can be viewed as "sets within sets" of derived traits. Which features distinguish the clade containing mice and humans from the other clades in this cladogram?                                          

Over evolutionary time, flowering plants have evolved colors, odors, and nectar that attract pollinating insects and the insects have evolved mechanisms that detect the changes in plants and to better collect pollen. This is an example of ____.

With ____ selection, the frequency of a favored allele will increase as a phenotypic variation becomes more adaptive.

____ selection occurs when individuals choose mates with a particular desirable trait.

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?

With the extinction of the dinosaurs 65 million years ago, multiple niches that the dinosaurs once filled opened up and allowed mammals the opportunity to evolve and exploit those niches. This is an example of ____.

Overhunting of the northern elephant seals left only twenty individuals, from which the modern population arose. As a result, each animal is most likely ____ for most alleles.

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.

What is the best definition of a population?

The branch points on a cladogram represent ____.