In Figure 16.1, how many mL is the expiratory reserve volume?
A) 1700
B) 600
C) 2800
D) 2200
E) 1300
Answer: E) 1300
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Why are such a high percentage of infant botulism cases associated with ingestion of honey?
A. Bees cultivate C. botulinum bacteria within their hives as a food source, so it gets mixed in with the honey. B. The infant digestive tract is far more susceptible to the effects of botulism toxin (found in the honey in relatively high levels) than the adult digestive tract. C. The spores of C. botulinum produce a strong endotoxin. This endotoxin has little effect on adults due to their overall size. Infants, however, are significantly smaller (and therefore far more susceptible) than adults. D. There can be endospores from C. botulinum in honey. They may germinate in the intestines of infants following consumption of honey, leading to colonization and pathogenesis as the bacteria begin forming botulism toxin. Adults' normal intestinal microbiota will out-compete the new microbes, but very young infants may not yet have this normal flora established.
Homologous chromosomes
a. may exchange parts during meiosis. b. have alleles for the same characteristics even though the gene expression may not be the same. c. are in pairs that have one chromosome of each pair from the father and one from the mother. d. pair up during meiosis. e. all of these
Arthropods with mandibles, gills, excretory glands, and statocysts are the:A
insects. B. spiders. C. scorpions. D. crustaceans. E. mites.
What is the function of the buds formed by hydra?
A. They aid in digestion. B. They are a form of asexual reproduction. C. They develop into cnidocytes and can be used in defense. D. They develop into the nerve net and are used to detect prey. E. They produce new epidermal tissue to replace the old tissue.