The rapid leaf movements resulting from a response to touch (thigmotropism) primarily involve _____
A) potassium channels
B) nervous tissue
C) aquaporins
D) stress proteins
A
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An important requirement for appropriate inoculum preparation in susceptibility testing includes the use of a(n):
a. pure culture. b. single isolated colony. c. variety of colony morphotypes. d. inoculum equivalent to the bacterial bur-den at the site of infection.
The habitats most favorable for the growth of legumes in symbiosis with nitrogen-fixing bacteria are
A. potassium-poor soils. B. phosphorus-poor soils. C. manganese-poor soils. D. calcium-poor soils. E. nitrogen-poor soils.
Cellular pH is kept near a value of 7 because of
a. salts. b. buffers. c. acids. d. bases. e. water.
Among the areas of the female genital tract, which of the following is NOT colonized by Neisseria gonorrhoeae?
A. the vagina B. the cervix C. the uterus D. the Fallopian tubes E. the pelvic organs