The kidneys are important homeostatic organs, contributing to maintenance of all of the following EXCEPT
A. ion concentration of extracellular fluids.
B. blood pressure.
C. destruction of worn-out red blood cells.
D. blood volume.
E. blood pH.
C. destruction of worn-out red blood cells.
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The melting point is:
A. the temperature at which double-stranded DNA begins to melt. B. the temperature at which double-stranded DNA is completely melted. C. the temperature at which double-stranded DNA is too single-stranded to ever renature back to double strands. D. the temperature at which double-stranded DNA has become 50% single-stranded. E. the temperature at which double-stranded nucleic acids degrade into free nucleotides.
What area of water serves as nursery grounds for many species of marine fishes and invertebrates?
a. photic zones b. benthic zones c. estuaries d. pelagic zones e. limnetic areas
Which of the following occurs subsequent to the
invasion of bacteria into a wound? a. complement activation b. capture of bacteria by lymph nodes c. binding of bacteria to B cells d. attraction of phagocytes by the chemotactic factors secreted by the bacteria e. all of these
Which of the molecules listed in question 5 are involved in transcription?
A. DNA, B. mRNA, C. tRNA, D. Amino Acids