You are studying populations of a certain species of frog in two ponds five kilometers apart. There are no other ponds in the area. In pond A all the frogs are small and have a few black spots on them. In pond B most of the frogs are large and lack spots but a few are small without spots and a few are large with spots. Which of the following is the most likely cause of the genetic diversity seen in pond B?
A. The small frogs and spotted frogs in pond B are mutations.
B. Pond A frogs resulted from individuals migrating from pond B.
C. The small frogs and spotted frogs in pond B probably are the result of some frogs migrating from pond A to pond B.
D. Meiosis generated more genetic diversity in pond B than in pond A.
C. The small frogs and spotted frogs in pond B probably are the result of some frogs migrating from pond A to pond B.
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Disturbances:
A. involve interactions such as competition and predation. B. affect populations differently according to their density. C. usually only affect one particular species in a community. D. are extremely rare. E. can influence the diversity of a species in a community.
An ________ pathogen can cause disease in a host with impaired resistance.
Fill in the blank(s) with the appropriate word(s).
Which of the following is an overgrowth of cells that serves no useful purpose?
A. tumor B. oncogene C. proto-oncogene D. growth E. callus
The orderly pattern of gathering and analyzing information to understand how the natural world works is called:
a. scientific method. b. logical reasoning. c. deductive reasoning. d. inductive reasoning. e. theory formation.