A breakfast cereal is advertised as containing essential vitamins and minerals. In this context, the word essential means __________.
a. that the substances contain the "essence" of the vegetables from which they are extracted
b. that they are the nutrients that should comprise the largest component of our diet
c. that they are necessary for life
d. that the nutrients must be supplied in the diet and cannot be made in the body
e. nothing: this is just a gimmick
Answer: d. that the nutrients must be supplied in the diet and cannot be made in the body
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Which of the following human viruses causes
warts?
a. papillomavirus b. rubella virus c. adenovirus d. Ebola virus e. herpes virus
Which of the following statements is false?
a. Connective tissue of the cervix weakens during the final weeks of pregnancy. b. It is not possible for a woman to become pregnant after engaging in intercourse if the male does not ejaculate. c. The rupture of the amniotic sac with the release of its fluid is one of the events that usually precedes birth. d. After the baby is born, uterine contractions continue so that the placenta is expelled. e. Just as females should examine their breasts each month for possible lumps, males should also self-examine their testes for lumps that possibly indicate cancer.
Why are respiratory systems necessary for complex, multicellular organisms?
What will be an ideal response?
Which of the following is an indirect, as opposed to a direct, value of biodiversity?
A. ecotourism B. medical use C. consumptive use D. food E. agricultural use