Which two drugs are in the same category?
A. cocaine and marijuana
B. alcohol and heroin
C. nicotine and alcohol
D. nicotine and heroin
E. marijuana and heroin
Answer: B
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Chemical digestion of amino acids using pepsin begins in which organ?
a. A b. B c. C d. D e. E
During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which statement is most likely to be helpful in correcting this student's misconception?
A. Disuse of an organ may lead to its eventual disappearance. B. Only favorable adaptations have survival value. C. If the giraffes did not have to compete with each other, longer necks would not have been passed on to the next generation. D. Characteristics acquired during an organism's life are generally not passed on through genes. E. Spontaneous mutations can result in the appearance of new traits.
No known living humans have one whole chromosome of a homologous pair of autosomes deleted from the genome
Indicate whether the statement is true or false
The G1, S, and G2 phases of the cell cycle are collectively known as
A. meiosis. B. metaphase. C. prophase. D. interphase. E. mitosis.