How does the nervous system influence the respiratory system. A. It controls muscle contraction.
B. It stimulates defense against pathogens
C. It regulates urine output.
D. It regulates heart rate.

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Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above