What percentage of the world's tropical forests have been cut down for cropland, fuel wood, grazing
land and timber?
a. 20%
b. 30%
c. 40%
d. 50%
e. 60%
D
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The most frequent cause of uncomplicated community-acquired urinary tract infections is:
a. S. saprophyticus. b. Klebsiella spp. c. E. coli. d. Proteus.
The process by which DNA is reproduced, with the use of associated enzymes, is
A. DNA translation. B. catalyzed protein synthesis. C. DNA transcription. D. DNA replication. E. DNA ligation.
The equation above shows one of the reversible reactions that occur in blood. After exercise, an athlete's blood pH has dropped below the normal level. How will normal blood pH be restored?
A) An increase in 02 concentration in the plasma will lead to an increase in H+ concentrations. B) An increase in temperature will lead to an increase in H+ concentration. C) An increase in sweating will lead to a decrease in OH- and H+ concentrations. D) An increase in breathing rate will lead to a decrease in blood CO2 and H+ concentrations.
In eukaryotic cells, ribosomes have two locations: scattered free in the ________, and bound on the surface of the ________.
What will be an ideal response?