Which "no-touch" room decontamination method showed significant effectiveness against MRSA, Acinetobacter, and C. difficile?
A. Photosensitizers
B. Aerosolized hydrogen peroxide
C. Titanium dioxide
D. Vaporized hydrogen peroxide systems
D. Vaporized hydrogen peroxide systems
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Which of the following are normally
associated with asteroids or their impact on Earth?
a. iridium b. tektites c. shocked quartz d. craters e. all of these
Which property of water molecules is responsible for movement of water from roots to leaves in a plant?
a. hydrophobicity b. temperature stability
c. fusion d. solvent polarity e. cohesion
Why is ATP needed for muscle contraction?
A) It causes tropomyosin to slide off the myosin-binding sites of actin. B) It's needed for calcium release from the sarcoplasmic reticulum. C) It causes calcium to bind to troponin. D) Myosin must contact the actin filament and move to pull it toward the midline of the sarcomere.
Angiosperms are most closely related to _____.
a) bryophytes b) seedless vascular plants c) green algae d) gymnosperms e) charophyceans