The study of the spatial arrangement of elements in communities and ecosystems is known as
A. community ecology.
B. ecosystem ecology.
C. landscape ecology.
D. population ecology.
E. global ecology.
Answer: C
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Deleterious alleles are eliminated from populations by
A) natural selection. B) mutation. C) nonrandom mating. D) genetic drift.
All of the following are true of the SA node EXCEPT that it
A) is the pacemaker. B) is influenced by nerve impulses and hormones. C) directly stimulates the ventricles. D) directly stimulates the atria.
Which of the following is mismatched?
A. Salk vaccine; requires boosters B. Sabin vaccine; live attenuated vaccine C. Salk vaccine; administered orally D. Sabin vaccine; less stable E. Salk vaccine; inactivated polio vaccine
Optimal recovery and identification of anaerobic bacteria in clinical specimens occurs when:
a. the initial incubation period is at 35°C to 37°C for 48 hours. b. plates are incubated for at least 3 days before discarding as negative. c. the initial incubation period is at 35°C to 37°C for 24 hours. d. thioglycollate broth can be inspected daily for 3 days.