One effect of auxin, which triggers the elongation of cells, is to affect cell walls by increasing their
A. permeability.
B. water solubility.
C. stiffness.
D. thickness.
E. plasticity.
Answer: E
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A cerebrospinal fluid (CSF) culture was performed on a newborn in distress. After overnight incubation, small gram-positive bacilli with a soft zone of <-hemolysis grew on sheep blood agar. Based on this information, what results would be expected on the following tests: hippurate; Christie, Atkins, Munch-Petersen (CAMP); and motility?
a. Negative hippurate, positive CAMP, and negative motility b. Positive hippurate, negative CAMP, and positive motility c. Positive hippurate, positive CAMP, and positive motility d. Negative hippurate, negative CAMP, and negative motility
Density-independent factors which play a role in regulating population size in nature include
A. natural disasters. B. geographical barriers. C. weather. D. All of the choices are correct.
Stem cells are?
A) Omnipotent B) Monopotent C) Pluripotent D) Biopotent
Which of the following characteristics of a catheter should be considered, to help minimize the spread of nosocomial infections?
A) Inexpensive B) Long C) Single-use D) Reusable E) Washable