Which is most likely to happen to a population that becomes anatomically isolated from the rest of its species?
Scientists today can use many investigative methods to study evolution. Which method was developed after Darwin’s 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?
A student argues that being separated geographically is the only way for speciation to occur. Why is he wrong?
Why do species evolve during adaptive radiation?
What is the main difference between adaptive radiation and other forms of speciation?
Darwin hypothesized that new species could appear gradually through small changes in an ancestral species. What experiment did he conduct to test this hypothesis?
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?
Which of the following could result in speciation from biogeographic isolation?
Which lists the correct sequence of events for evolution to occur through isolation?
Did you find these answers helpful?