The Crenarchaeota group of archaeons contains which of the following types of organism?
A. hyperthermophiles
B. hypothermophiles
C. halophiles
D. methanogenic organisms
E. basophiles
A
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The most frequent agent of nosocomial bacteremia is:
a. catalase-negative micrococci. b. coagulase-positive staphylococci. c. catalase-negative stomatococci. d. coagulase-negative staphylococci.
Mature plants such as these trees are diploid gametophytes
1.True
2.False
Molecular biologists rely on many, often sophisticated, techniques to pursue their discipline. Ultracentrifugation, electron microscopy, X-ray diffraction, electrophoresis, and computer interfacing are fundamental tools
Model organisms provide the raw materials for study. List three organisms (or organismic groups) often used by recombinant DNA technologists and describe a major advantage of each group.
Which of the following does not belong?
a) phospholipids b) polysaccharides c) waxes d) steroids e) saturated fats f) unsaturated fats