1. A species of wren arrives on a chain of volcanic islands off the coast of New Zealand that previously had no wrens. After several thousand years, wrens from these islands are able to interbreed with occasional migrants from the mainland, but the resulting offspring are poorly adapted to compete with the local wrens and produce no offspring. This is an example of what type of speciation and what type of isolation mechanism?
If wrens on each island were able to interbreed, and produce fit offspring, with wrens on adjacent islands, but crosses involving wrens from distant islands produced sterile and unfit offspring, this would be what type of species? explain
2. An series of isolated population of salamanders lives on a ring of mountaintops in the Ozarks. Individuals occasionally migrate to other populations, but this is rare. On the average, one migrant reaches a new mountaintop every five generations, and only half of these reproduce. Is the rate of migration sufficient to stop the affects of genetic drift? Over time, would separate species of salamanders develop? Why or why not?© BrainMass Inc. brainmass.com October 24, 2018, 7:35 pm ad1c9bdddf
Speciation, concepts of speciation and mechanisms of speciation
please tell me about speciation, defining the concept of speciation, and briefly explaining the mechanisms of speciation. Be sure to include references can be anything from anywhere.View Full Posting Details