Exam 17: The Origin of Species

Horses and donkeys can mate successfully to produce mules, which are always sterile. Which genetic isolating mechanism prevents horses and donkeys from becoming a single species?

When some hybrid organisms do not live long, it is an example of

A pet store puts both Norway rats (Rattus norvegicus) and black rats (Rattus rattus) in the same cage. If mating occurs, the pregnancy will not succeed because the embryos fail to develop properly. This is an example of

The origins of 300 or more species of cichlid fish in Lake Malawi can best be explained by

In northern Minnesota, the lynx (Lynx canadensis) habitat overlaps the bobcat (Lynx rufus) habitat. The two can breed and produce healthy, fertile offspring, which could lead to

One species of fish feeds in the muddy bottom of a lake. A second species eats insects that land on the water surface. This is an example of

Temporal isolation is an example of

One species of moss in upstate New York produces gametes in May, and another species of moss in the same region produces gametes in June. This is an example of a(n) _________isolating mechanism.

Two different species of pine release their pollen at different times of the year. This is an example of

Which species is most likely to become extinct?

Which of the following is the most prevalent immediate cause of extinction?

Where would a researcher most likely find examples of allopatric speciation?

Which of these definitions of species best matches the biological species concept?

When the pollen of one plant species will not germinate on the flower of another species, it is an example of

When hybrid offspring are created between species but are unable to breed successfully, it is referred to as _________.

The Great Dane and the Chihuahua are both domestic dogs (the same species), but mating between them is limited because of

A single species of finch from South America was displaced to a new habitat in the Galápagos Islands and evolved rapidly into several new species as it exploited the new resources. What occurred in these Darwinʹs finches?

The introduction of a few individuals into a new habitat that is unoccupied by other members of the species is a(n)

Polyploidy is an important mechanism of speciation in plants.

One method of maintaining the genetic isolation of a population is the inability of sperm to fertilize eggs of a different species. This is called