BIOGEOGRAPHIC ISOLATION

Why do species evolve during adaptive radiation?
to fill different niches
to create variation
to become reproductively isolated
to provide evidence of evolution

to fill different niches

Which of the following is the best definition of biogeographic isolation?

the separation of members of a species through geographical or biological forces
the separation of members of different species through geographical or biological forces
the separation of populations of different species through time
the separation of members of a species through anatomical forces

the separation of members of a species through geographical or biological forces

Scientists today can use many experimental methods to study evolution. Which method was developed after Darwin’s time?

DNA comparisons
observations
fossils
experimentation

DNA comparisons

Cardueline finches can be found in many areas of the world, including North America and Asia. Hawaiian honeycreepers, which are found only in Hawaii, have been found to have DNA commonalities with this group of finches that indicate they have a common ancestor. Which mechanism might have led to the appearance of the Hawaiian honeycreeper?

anatomical isolation
temporal isolation
geographical isolation
behavioral isolation

geographical isolation

The northern red-legged frog, or Rana aurora, is found along the western coast from British Columbia to Northern California. Their typical breeding season lasts from January to March. The foothill yellow-legged frog, or Rana boylii, is found along the western coast from northern Oregon to central California. Their typical breeding season lasts from April to July. What mechanism might keep Rana aurora and Rana boylii from mating?

anatomical isolation
temporal isolation
geographic isolation
behavioral isolation

temporal isolation

Which of the following could result in speciation from biogeographic isolation?

the isolation of two populations of the same species
the isolation of two individuals of the same species
the isolation of two populations of different species
the isolation of two individuals of different species

the isolation of two populations of the same species

Gentoo penguins will present a mate with a pebble that they find to attract a mate. Emperor penguins have a specific call and movement that they make to attract a mate. Which type of isolation do these penguins demonstrate?

temporal isolation
behavioral isolation
geographical isolation
anatomical isolation

behavioral isolation

Which lists the correct sequence of events for evolution to occur through isolation?

founding population arrives, biogeographic isolation occurs, genetic changes occur, reproductive isolation results
genetic changes occur, founding population arrives, reproductive isolation results, biogeographic isolation occurs
biogeographic isolation occurs, founding population arrives, genetic changes occur, reproductive isolation results
founding population arrives, genetic changes occur, biogeographic isolation occurs, reproductive isolation results

founding population arrives, biogeographic isolation occurs, genetic changes occur, reproductive isolation results

Which is most likely to happen to a population that becomes anatomically isolated from the rest of its species?

The entire species will become extinct.
The population will become a separate species over time.
The population will breed with a different species nearby.
The entire species will continue to have viable offspring together.

The population will become a separate species over time.

Marsupials, such as kangaroos, koalas, and wombats, are mammals that care for their newborn young in a pouch. All marsupials that are found in Australia are thought to have evolved from a single species that migrated to the island and then adapted to the various niches. What does this example illustrate?

behavioral adaptation
adaptive radiation
geographic isolation
population explosion

adaptive radiation

What is the main difference between adaptive radiation and other forms of speciation?

Adaptive radiation is a mechanism for evolution.
Adaptive radiation happens over a relatively short time.
Adaptive radiation requires a founding population.
Adaptive radiation occurs only on islands.

Adaptive radiation happens over a relatively short time.

Two species of flies, Drosophila melanogaster and Drosophila simulans, can mate. They usually do not mate, however, even if they are kept together in a laboratory. Males court the females of both species, but the females prefer to mate with males of their own species. Which isolating mechanism does this describe?

behavioral
temporal
geographical
anatomical

behavioral

Horses and donkeys can mate, but they produce a mule, which is always a sterile animal. This means that they cannot produce viable offspring and are ______________ isolated.

reproductively

Which of the following must occur for speciation to happen?

geographic isolation
reproductive isolation
temporal isolation
behavioral isolation

reproductive isolation