Which of the following is NOT a function of the integumentary system?
A. defense against pathogens
B. fluid transport
C. supporting the weight of body structures
D. protection from dehydration
E. regulation of body temperature
C. supporting the weight of body structures
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Which molecule is the main structural component of biological membranes?
a. starch b. triglyceride c. protein d. phospholipid e. steroid
Which of the following is NOT one of the signs of aging in the skin?
a. increased collagen b. reduced fibroblasts c. increase in sweat glands d. less pigmentation in hair e. increased fat deposits
According to the equation for population growth rate, if two populations have the same death rates, then the population with r = 2 will increase more rapidly than a population with r = 4
Indicate whether the statement is true or false
Which of the following types of organisms uses hydrogen sulfide for reducing power?
a. Cyanobacteria b. Algae c. Purple sulfur bacteria d. Green nonsulfur bacteria e. Purple nonsulfur bacteria