Paul Ehrlich used chemotherapy to treat
A. cholera.
B. cancer.
C. anthrax.
D. smallpox.
E. syphilis.
Answer: E
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In higher organisms, successful mating can occur between members of the same
A. genus. B. species. C. class. D. order.
What do you predict would be the likely physical and/or emotional effect(s) of repeated cocaine use?
_____ Marked elevation of blood pressure, which can be life threatening. _____ A rise in tolerance requiring larger dosages to achieve the same effect. _____ The chemical break down of tooth enamel. _____ Increased risk of strokes and heart attack. _____ Intense euphoria, followed by depression.
Carbon dioxide generally enters a plant through pores called
A) mesophylls. B) stomata. C) cuticles. D) connexons. E) bacteriochlorophylls.
Which of the following is True concerning sexual selection?
A. Sexual selection always produces showy males. B. The results of sexual selection always increase the risk of predation. C. Hermaphroditic species use sexual selection to determine which sex to be during reproduction. D. Sexual dimorphism can indicate sexual selection.