Which of the following is one of the most important and widespread hospital pathogens, and is often resistant to common antibiotics?
A) Staphylococcus aureus
B) Pseudomonas aeruginosa
C) Escherichia coli
D) Klebsiella pneumoniae
E) Salmonella typhi
Ans: A) Staphylococcus aureus
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Meiosis in a diploid organism typically results
in the production of
a. two diploid cells. b. four diploid cells. c. four haploid cells. d. two haploid cells. e. one triploid cell.
Planktonic organisms that spend part of their lives in planktonic form and the rest of their lives as either benthos or nekton are called:
What will be an ideal response?
This occurs when a cell gains new genetic information from its environment.
A. genetic transformation B. translocation C. conjugation D. replication
The most likely explanation for any mass-extinction event is
A) a gradual increase in global temperature. B) coevolution of predator and prey species. C) loss of genetic diversity due to inbreeding. D) human activity. E) rapid environmental change.