Each genotype can only produce a single phenotype
a. true
b. false
Answer: b. false
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Which contraceptive method is the most effective form of birth control?
a. condoms b. diaphragms c. abstinence d. oral contraceptives e. vasectomy
Which substance is most likely an enzyme?
A) proline B) stearic acid C) endopeptidase D) acetylcholine
Gram-negative bacteria are characterized by the presence of a gram-negative envelope. Which of the following are components of this envelope?
A) The plasma membrane, outer membrane and periplasm. B) The plasma membrane and the outer membrane, peptidoglycan layer and periplasm. C) The outer membrane, peptidoglycan and periplasm. D) The plasma membrane, peptidoglycan and the outer membrane.
The main function of bacterial endospores is:
A. Protection of bacteria against phagocytosis B. Survival against environmental dangers C. Induction of antibiotic resistance D. Recognition of specific receptors on target cells E. Reproduction