Why do lymph nodes swell during an
infection?
a. Macrophages accumulate in them.
b. Bacteria accumulate in them.
c. T cells accumulate in them.
d. Production of lymphatic fluid increases.
e. Production of mucous increases
C
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Immature sperm pass through the ____, a coiled duct on top of the testes, where they mature
a. epididymis b. seminal vesicle c. prostate d. vas deferens e. prostate
Which of the following statements is NOT true?
a In asexual reproduction, the parent passes a complete set of genes to its offspring. b. In sexual reproduction, both meiosis and fertilization must occur during the life cycle. c. In sexual reproduction, a human offspring receives two genes for every trait. d. Sexual reproduction puts together new combinations of genes. e. Sexual reproduction produces clones.
You have inherited some old glass baby milk bottles from your grandmother, and you would like to use them instead of plastic bottles. The bottles are placed into a large metal container and placed in the oven at 325°F for about 2 hours. What factor would you change if you wanted the sterilization to occur much quicker?
A. Increase the temperature of the oven by 5 degrees B. Use a pressure cooker to sterilize the bottles with steam C. Place the bottles outside in the sunlight and then place in the oven D. Pour an antimicrobial chemical into the bottles before placing into the oven
An important anaerobic process in the degradation of some xenobiotics is
a. oxidation by oxygenases and dioxygenases. b. cometabolism. c. microbial leaching. d. reductive dechlorination.