The 30,000 elephant seals alive today are genetically very similar due to The

 The 30,000 elephant seals alive today are genetically very similar due to
The 30,000 elephant seals alive today are genetically very similar due to
   A.random mutation.
   B.natural selection.
   C.artificial selection.
   D.the bottleneck effect.
   E.the founder effect.

The Hardy-Weinberg principle relies on which concept?
   A.Populations only evolve when specific conditions occur.
   B.Populations remain at a constant size under Hardy-Weinberg conditions.
   C.Evolution can be disproven by a set of conditions.
   D.Populations never evolve under any conditions.
   E.Populations stay in balance with their environment.
   F.Populations cannot evolve when natural selection is at work.
 
Multidrug-resistant bacteria
   A.have always been common in the natural environment.
   B.are becoming less widespread.
   C.have been eradicated worldwide.
   D.are becoming more widespread.
   E.are not serious threats to human health.