Examine the following scenario:
a population of small fish...
a population of small fish lives in a lake (lake a). the dark-colored fish are the ancestral phenotype and represent the usual coloration of the species. the bright-colored fish, however, arose over time.
there is a steady rise in the population of bright-colored fish. both populations thrive.
suppose that a short land barrier separates lake a from another small lake with a population of only the normal dark-colored fish (lake b). after torrential rains lasting for days, the lakes overflow and a few of the bright-colored fish from lake a are washed into lake b.
list the sequence of evolutionary mechanisms which have come into effect in each event.
a. genetic drift, mutation, natural selection
b. mutation, founder principle, bottleneck effect
c. mutation, natural selection, migration (gene flow)
the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.
the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.
the endomembrane system i think
a population of small fish lives in a lake (lake a). th...