Dyes are often added to growth media to aid in the identification of microbes. What could be the purpose of a dye in this case?
A) to make the plate prettier
B) to color key the type of plate being used
C) to act as a growth enhancer
D) to act as a pH indicator
Ans: D) to act as a pH indicator
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This type of tissue has gap junctions, a single
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a. skeletal muscle. b. smooth muscle. c. cardiac muscle. d. striated columnar epithelium. e. more than one of these
Which of the following is the most effective means of treating or even curing sickle-cell disease?
A. Bone marrow transplants B. Antibiotics C. Gene therapy D. Blood transfusions
The erection of the clitoris is possible because its internal structure contains _____.
A. urethra B. corpora cavernosa C. seminiferous tubules D. smegma
What is the negative water pressure in the xylem of a plant?
A) torsion B) cohesion C) adhesion D) tension