Dr. Jones performed a vitamin supplementation study. She had 6 subjects, all of which were men age 18-22. The subjects took 10 mg of vitamin B6 once a day for 10 days. At the end of the study, the subjects reported increased stamina and an average increase in muscle of 1.3 pounds. Which of the following statements is TRUE regarding this study? a. The study had a control group.
b. The study was well designed concerning the number of subjects and the duration.
c. The results are applicable to men and women.
d. Public recommendations should be made about the benefits of vitamin B6 supplementation and increased stamina and muscle mass.
e. None of the above

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes