Which two plants of the Carboniferous period contributed to the formation of today’s coal deposits?
a. lichens and true mosses
b. hornworts and liverworts
c. horsetails and club mosses
d. whisk ferns and true mosses
e. angiosperms and gymnosperms
c
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Portable UV room sterilizing units are being used to reduce endospores of Clostridum difficile in patient hospital rooms after patients have vacated the room. Which of the statements best describes this application?
A. UV radiation will destroy C. difficile endospores and penetrates well to all locations within the room. B. UV radiation will not destroy C. difficile endospores. C. UV radiation will destroy C. difficile endospores and has residual sporicidal effects that will persist after the unit has been removed from the patient's room. D. UV radiation will destroy C. difficile endospores assuming it is applied for a long enough period and directly contacts all surfaces.
Which of the following countries is NOT in the
industrial stage? a. Japan b. Canada c. Australia d. Mexico e. United States
Osteoporosis is a condition of excessive bone loss caused by an imbalance between osteoblast and osteoclast activity, and occurs primarily in women.
a. true b. false
Arteries have ________ compliance and ________ resistance to flow.
A) low : low B) high : high C) low : high D) high : low E) zero : high