The amount of rest needed to recover from physical exertion is _______ related to the intensity of the work performed.
a. not
b. inversely
c. somewhat
d. directly
Answer: d. directly
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The presence of the loop of Henle allows which animals to reabsorb water and produce a hypertonic urine?
A. birds B. marine fish C. mammals D. birds and mammals E. freshwater fish and mammals F. birds and reptiles
How do prokaryotic and eukaryotic chromosomes differ?
A) Eukaryotic chromosomes occur singly, and prokaryotic chromosomes occur as pairs. B) Genetic information is stored as DNA in eukaryotic cells and as proteins in prokaryotic cells. C) Prokaryotic chromosomes are not made from nucleotides. D) Prokaryotic chromosomes are not contained in a membrane-bound organelle.
The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is
A. assembly of nucleocapsids. B. replication of viral nucleic acid. C. host cell synthesis of viral enzymes and capsid proteins. D. injection of the viral nucleic acid into the host cell. E. adsorption to the host cells.
Redi concluded from his experiment that
A. maggots arise from decaying meat. B. air is a "vital element" necessary for spontaneous generation. C. living things arise from other living things. D. microorganisms are present in the air.