Exam 12: Processes of Evolution

_____ are hot spots for the evolution of antibiotic-resistant bacteria and their spread to humans due to excessive use of antibiotics.

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

The increased variability in the frequency of the b+ allele in the smaller flour beetle population in the graph above is an example of ____.

The observation that female lions prefer male lions with darker manes is an example of ____.

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

Two species of toads have been successfully interbred in a laboratory but do not hybridize in nature because one species mates in summer and the other mates in the fall. This is an example of ____ isolation.

In a population of rabbits, those able to outrun predators will survive to reproduce, eventually leading to a population of faster rabbits. This is an example of ____ selection.

How are new combinations of alleles introduced into chromosomes?

In a tropical forest some leaves are dark green and some are light green. In a population of caterpillars, homozygous dominant dark green caterpillars thrive eating the dark green foliage, while homozygous recessive light green caterpillars thrive eating light green foliage. However, heterozygous caterpillars of an intermediate color green are easily seen by birds and eaten, thus their numbers are far less than the dominants or recessives. This is an example of ____ selection.

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 ____.

Which population is more likely to be affected by genetic drift?

Hawaiian honeycreepers exhibit diverse beaks that allow them to feed on insects, flowers, and seeds in their different habitats. This is an example of ____.

A ____ mutation changes the DNA sequence but has no impact on the fitness of the individual.

Traits with more than two distinct forms are ____.