The major components of Earth’s atmosphere, from the lowest concentration to the greatest concentration, are:a
carbon dioxide, oxygen, and nitrogen.
b. carbon dioxide, nitrogen, and oxygen.
c. nitrogen, oxygen, and carbon dioxide.
d. nitrogen, carbon dioxide, and oxygen.
e. oxygen, nitrogen, and carbon dioxide.
a
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Isolates from CSF that are gram-negative coccobacilli, grow on chocolate agar in CO2 but not blood agar, require factor V but not X, and are nonhemolytic on rabbit or horse blood may be identified as:
a. H. parainfluenzae. b. H. influenzae. c. H. aphrophilus. d. H. ducreyi.
Epiphytes are non-parasitic plants that grow on other plants
a. True b. False
Edward Jenner infected individuals with ____ to protect them from ____
a. chickenpox; smallpox b. smallpox; chickenpox c. smallpox; cowpox d. cowpox; smallpox e. cowpox; chickenpox
Which of the following is NOT a characteristic of phospholipids?
A) They are found in cellular membranes. B) They can form micelles and bilayers. C) They contain fatty acids that associate with water. D) They contain a hydrophilic phosphate "head." E) They contain two fatty acids and a phosphate functional group.