Objections to the "Stepping-Stone" Hypothesis, Suggesting That Deep-Sea Hydrothermal Vent

question 36

Multiple Choice

Objections to the "stepping-stone" hypothesis, suggesting that deep-sea hydrothermal vent organisms are dispersed by taking advantage of whale falls (like stepping-stones) , include all of the following except

• A) the number of overlapping species found at multiple sites is small.
• B) most whales live and die in shallow waters.
• C) increasing numbers of vents found suggest that dispersal is not a problem.
• D) chemosynthetic organisms found at whale falls are not the same as at hydrothermal vents.

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Definitions:

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A medical condition where the blood does not clot properly, causing excessive bleeding or clotting.

Hematocrit

A blood test measurement indicating the percentage of red blood cells in a given volume of blood.

Erythrocyte Sedimentation Rate

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