Which of the following represents microbial control by osmotic pressure?
A. Placing fruit slices on a drying rack
B. The crew of the Mayflower using salted meats throughout their voyage to the New World
C. Pickling cucumbers and other vegetables for long-term storage
D. Canning tomatoes after a summer growing season to use throughout the winter
Answer: B
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A testcross is always performed between the individual that is heterozygous for the genes to be mapped and an individual who is ____________
A. Heterozygous for the genes B. Homozygous dominant for the genes C. Homozygous recessive for the genes D. Lacking the genes E. None of the answers are correct
Which of the following molecules is nonpolar?
A. C2H5COOH B. C2H6 C. R-NH2 D. C3H7OH E. C5H10O5
Antimicrobial agents that inhibit bacterial growth but generally do not kill the organism are known as:
a. bactericidal. b. antibiotic. c. bacteriostatic. d. antagonistic.
The agent that causes hepatitis D is a(n) viroid that can only reproduce when the hepatitis B virus is also present
____________________ Indicate whether the statement is true or false.