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
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.
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