Classification.Respond to the following statements with reference to the organ systems listed below.
A. distributes antibodies throughout the body
B. involved in the immune response
C. recovers excess tissue fluid
D.
E. secretes substances that change the activity of other organ systems
F. initially encounters airborne pathogens
A. circulatory
B. lymphatic
C. lymphatic
D. digestive
E. endocrine
F. respiratory
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The idiosyncratic hypothesis suggests that:
A. Ecosystem function changes unpredictably as the number of species increases or decreases. B. Ecosystem function decreases as the number of species decreases. C. Ecosystem function changes in a predictable, but non-linear manner with a change in species number. D. Ecosystem function is independent of the number of species. E. Ecosystem function decreases as the number of species increases.
Femaleness or maleness is genetically set at
A) gamete formation. B) fertilization. C) the embryonic period. D) the fetal period.
Examples of polysaccharides include all of the following except
a. chitin. b. glycogen. c. cellulose. d. sucrose. e. starch.
Chemotherapeutic agents that are artificially produced are most specifically referred to as ________.
A. antimicrobial agents B. synthetic drugs C. semisynthetic drugs D. antibiotics