Which of the following tends to be more complex in a parasitic helminth than in free-living helminths?
A) digestive system
B) nervous system
C) reproductive system
D) digestive and nervous systems
E) digestive, reproductive, and nervous systems
C
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Blood plasma transports a variety of substances, including hormones, nutrients, carbon dioxide, electrolytes, and urea. Which of the following statements is INCORRECT regarding these substances?
a. Electrolytes are transported to the cells where they are used to maintain cell volume. b. Urea is transported to the urinary system for removal. c. Nutrients are transported from the digestive system to the body cells. d. Carbon dioxide is transported from the cells to the lungs. e. Hormones are transported from the nervous system to the body cells.
Thickened stems that grow underground, producing roots and new shoots are
A. tendrils. B. stolons. C. rhizoids. D. tubers. E. rhizomes.
Disruption of an enzyme's structure with loss of activity caused by extremes of pH, temperature, or other factors is called ________.
Fill in the blank(s) with the appropriate word(s).
Eating peanut butter, cantaloupe, chicken products, seafood, spinach, or handling a pet turtle are all sources of infection for which of the following bacteria?
A) Campylobacter jejuni B) Shigella dysenteriae C) Salmonella enterica serotype Enteritidis D) Salmonella enterica serotype Typhi E) Esherichia coli O157:H7