Which one of the following virulence factors contributes most to the spread of disease in the body?
A) endotoxin production
B) siderophore production
C) hemolysin
D) hyaluronidase
Ans: D) hyaluronidase
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A transgenic crop is created by _____
a. artificial selection b. selective breeding c. transfer of a genetic trait from a different species into the plant's cells d. culturing adult stem cells e. cutting DNA with restriction enzymes and separating the DNA fragments by size
The stomata ____
a. open at night in most plants b. are open when the guard cells are swollen with water c. close when water moves into the guard cells d. are covered by the cuticle to reduce water loss e. allow water to enter plant leaves
The plasma membranes of root hair cells contain a variety of protein transport channels through which specific ions are transported, even against large concentration gradients, by
A. carbohydrate pumps. B. water pumps. C. hydrogen ion pumps. D. root pumps. E. electron pumps.
________ states that depressed individuals are characterized by a negative cognitive tried, which shows their tendency to have negative views of themselves, their world, and their future.
Fill in the blank(s) with the appropriate word(s).