Exam 14: Speciation and Extinction

The two natural forms of Mimulus studied by scientists looking at the effects of pollinators on speciation were in the same species.

A discontinued line in an evolutionary tree indicates

Which of the following is not an example of macroevolution?

Hawthorn maggot flies that breed on native hawthorns and those that breed on introduced European apples can mate in the lab,but rarely mate in the wild.This is an example of ____ reproductive isolation.

Some flowers bloom in the spring while others bloom in the summer.This is an example of ____ reproductive isolation.

If a sheep and goat are mated,their offspring dies as an embryo.This is an example of ____ reproductive isolation.

Birds use specific songs,coloring,and mating dances to attract mates of their species.This is an example of ____ reproductive isolation.

Scientists can fill in gaps in defining species by DNA sequence analysis.

Formation of a tetraploid plant species from two different diploid parental species of plants is an example of

The scientific name of humans is Homo sapiens.What is the genus of humans?

Bacteria cannot be classified using the biological definition of a species for which reason?

Phylogenetics is (are)

If you observed that the sperm of a bull could not fuse in a lab dish with the eggs of a cow,you would say that the bull and the cow showed

Mules are a distinct species because they produce fertile offspring when mated.

A small angle for a branch point in an evolutionary tree indicates

Postzygotic isolation barriers prevent

Closely related plant species that attract different pollinators resulting in reproductive isolation is an example of

Every species has a unique two-word name called the

Two species of finches found on the same Galapagos island but feeding on different food sources is an example of ____ speciation.

What is the most inclusive level of the hierarchical classification scheme?