Exam 17: The Origin of Species

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

What are the five premating isolating mechanisms that keep different species from successfully mating?

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 fossils may be assigned to different species if

Einkorn (Triticum boeoticum) is an ancient grain with a diploid number of 14 (2n = 14). Durum (Triticum turgidum) appeared later. Durum grains are larger and the plant is hardier. It has twice the genetic material of Einkorn (2n = 28) but contains basically the same chromosomes. Can you propose a hypothesis on how durum evolved?

There are currently many similar- looking but different species on either side of the Isthmus of Panama. They most likely resulted from

Oceanic islands are not the only geographic habitats that can harbor isolated populations of individuals. What are some other examples of isolated "island" populations?

Lions and tigers can interbreed and produce offspring called tiglons or ligers, which have normal life spans but are sterile. Lions and tigers remain isolated genetically because of

For new species to develop, there must be _ in the population.

Two organisms that live on different islands are experiencing isolation.

Gametic incompatibility is an example of

The introduction of a new species into an area that has several different habitats and very rich resources, but no predators will likely lead to

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?

What is the best explanation for the origin of the unique species recently found in the Annamite Mountains of Vietnam?

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

What happens when two populations become geographically separated from each other and then genetic divergence occurs?

Temporal isolation is an example of

Crossing a zebra with a horse produces sterile offspring. This is an example of

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

Two species of pines, Pinus radiata and Pinus muricota, live in the same regions of California and are capable of forming hybrids under laboratory conditions. However, they do not interbreed because one releases pollen in February and the other in April. What genetic isolating mechanism is involved?