Which factor is most important for explaining why there are equal numbers of snapping shrimp species on either side of the isthmus?
A) the relative shortness of time they have been separated
B) the depth of the ocean
C) the number of actual depth habitats between the surface and the sea floor
D) the elevation of the isthmus above sea level
A
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In a chemical reaction, the standard free energy change (?G°') is calculated to be -3.67 cal/mol. What can be said of the chemical reaction?
A) The reaction is at equilibrium under standard conditions. B) The reaction is spontaneous under standard conditions. C) The reaction is not spontaneous under standard conditions. D) Reactants predominate over products at equilibrium under standard conditions. E) There can be no reaction.
By definition, for osmosis to occur, the membrane separating two compartments must be permeable to the dissolved solute
a. True b. False
A scientist discovers a new virus associated with a cancer. She is able to culture it in the laboratory and begins to analyze it. What features will help her determine the virus' classification? How does this help her understand the virus' mechanism for causing cancer?
What will be an ideal response?
Which of the following secretes erythropoietin?
A. heart B. thalamus C. thymus D. kidney E. small intestine