Which term refers to seedless vascular plants that are represented by only one living genus, Equisetum?
a. mosses
b. ferns
c. whisk ferns
d. horsetails
Ans: d. horsetails
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Which statement is false about prostaglandins?
a. They are local signaling molecules. b. They promote blood flow to injured tissue. c. They cause blood vessels to dilate. d. They act as pheromones. e. They alter chemical conditions in nearby tissues.
Neuroendocrine cells release neurohormones which are transported through contact or diffuse through
interstitial fluid. ____________________ Indicate whether the statement is true or false.
How do prions, which are misfolded proteins, infect organisms?
a) Prions only arise through spontaneous mutation. They are not transmissible. b) Prions recruit ribosomes to make more copies of the wrong form of the protein. c) Prions enter brain cells and cause normal forms of the protein to refold into the prion form. d) Prions enter brain cells through the lymphatic system and make copies of themselves. e) None of the above.
Which of the following diseases could be prevented with proper sewage disposal and water purification?
A. Lyme disease B. Cholera C. Leptospirosis D. Vibrio parahaemolyticus gastroenteritis E. Vibrio vulnificus gastroenteritis