What is the name of the tube through which urine leaves the urinary bladder?
a. renal vein
b. collecting duct
c. urethra
d. renal pelvis
Ans: c. urethra
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If the bacterial cells were viewed immediately after crystal violet was applied during the Gram stain procedure, gram-positive cells would be purple but gram-negative cells would be colorless.
Answer the following statement true (T) or false (F)
When measuring the age of a fossil using
Carbon dating, what is the oldest age that a fossil can be?
a. 2.2 million years old b. 200,000 years old c. 85,000 years old d. 72,000 years old e. 60,000 years old
An action potential is a brief reversal of the __________ potential. Fill in the blank(s) with the appropriate word(s)
The method in which a measured volume of bacterial suspension is placed within a defined area on a microscope slide is called the
A. direct microscope count. B. pour plate method. C. spread plate method. D. most probable number method