Help Which of the following would NOT characterize allopatric selection?
A
physical barrier within population.
B.
extensive gene flow.
C.
chromosomal changes within population.

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking

When your organs don't receive enough blood, they begin to a. shut down b. speed up c. inflame d. dry out

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