Water ecosystems become eutrophic when there is ________.
A. nutrient enrichment of waters
B. acidification of waters
C. nutrient removal from waters
D. deoxygenation of waters
Answer: A
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Bacterial and archaeal ribosomes are known as ________ ribosomes, based on their sedimentation coefficient.
A. 70S B. 80S C. 50S D. 30S
The hormone ________, secreted by the ________, stimulates the production of red blood cells when the level of oxygen in the body decreases
Fill in the blank(s) with correct word
The molecule that stores the set of instructions of a cell and directs everything a cell does is ________
Fill in the blank(s) with correct word
A nosocomial infection is
A) Always present but inapparent at the time of hospitalization. B) Acquired during the course of hospitalization. C) Always caused by medical personnel. D) Only a result of surgery. E) Always caused by pathogenic bacteria.