If a cell counter slide is determined to have a mean number of 20 bacterial cells per square, the total number of bacteria per ml of culture would be:
A. 1,000,000
B. 25,000,000
C. 50,000,000
D. Unable to determine
Answer: B. 25,000,000
You might also like to view...
Which of the following is likely NOT to be a mechanism for controlling hormone levels in the blood?
A. Alter the rate of synthesis and subsequent release of hormone into the blood. B. Change the rate at which an enzyme produces the hormone. C. Modify the structure of the hormone at its point of production so it no longer binds its receptor. D. Alter the rate at which the hormone is removed from the blood. E. Change the rate at which the hormone is excreted into the urine.
Which of the following events occurs during the first trimester of pregnancy?
A. The heart begins to form. B. The lungs fully mature. C. The fetus grows to 1 foot in length. D. The fetus has a very rapid phase of growth. E. All of these events occur during the first trimester.
Women died after childbirth of
A. S. aureus intoxication. B. toxic shock syndrome. C. Klein's disease. D. puerperal fever.
Summer squash plants with the dominant allele C bear white fruit, whereas plants homozygous for the recessive allele c bear colored fruit. Summer squash have a second locus that acts as a modifier gene if the plant is colored. IF the plant is colored and is G-- at the second locus, they will be yellow. If they are colored and gg at the second locus, they will be green. What will the ratio of white to yellow to green squash be in a cross between a double heterozygous plant and a double homozygous recessive plant (CcGg x ccgg)?
a. 4:3:1 b. 2:1:1 c. 9:3:3:1 d. 1:4:6:4:1