Consider a population of frogs. allele b1 codes for spotted frogs; allele b2 codes for non-spotted frogs. b1 is dominant to b2 .

the allele frequencies on the mainland are b1 = 0.75 and b2 = 0.25.

the allele frequencies on the island are b1 = 0.55 and b2 = 0.45. there are 170 frogs on the island.

during a storm, 30 non-spotted frogs come to the island by floating on debris. what are the new frequencies of b1 and b2 on the island?

enter your answer as two numbers (each to two decimal places), separated by a comma. (example: 0.56, 0.44)

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates