Differential reproduction is required for genetic drift
a. true
b. false
Answer: b. false
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Evolution by natural selection, as conceived by Darwin, is based on all of the following EXCEPT
a. excess growth of populations b. limitation of resources in the environment c. Mendel's experiments with peas d. variation within populations e. some individuals have hereditary characteristics that allow them to survive and reproduce more than others
Which term defines a relationship with a negative effect on both the actor and recipient?
A. Selfish B. Mutualistic C. Spiteful D. Altruistic
Which of the following antimicrobials does not match its potential shortcomings?
A) Macrolides: This narrow-spectrum drug must be administered parenterally. B) Phenicols: Has a narrow therapeutic index and is associated with bone marrow toxicity that results in aplastic anemia. C) Tetracyclines: Induce photosensitivity, causes detrimental effects on bones and teeth in children younger than 8 years old, and are associated with an increased risk of Clostridium difficile infection D) Aminoglycosides: Are known to cause irreversible hearing loss when administered other than topically. E) Lincosoamides: One common lincosoamide is associated with pseudomembranous colitis caused by Clostridium difficile.
The attenuated oral poliovirus vaccine (OVP) is no longer administered in the U.S.A. because it
A. is very toxic. B. does not provide good immunity. C. can occasionally cause poliomyelitis. D. can be spread to contacts. E. can be spread to contacts and can occasionally cause poliomyelitis.