Discuss the rationale behind taxonomists placing sharks and dolphins in different taxonomic groups, even though they are both aquatic, have very similar body forms, and share other traits as well

What will be an ideal response?


Responses should point out that dolphins are mammals and sharks are fish. While they may be similar in some respects, they have different origins. Taxonomy should reflect the phylogeny of organisms.

Biology & Microbiology

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In gel electrophoresis, DNA fragments are separated based on their:

A. sequence. B. size. C. charge. D. how many adenine bases are in the fragment. E. how many thymine bases are in the fragment.

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Which zone of a lake is closest to the shore?

a. Littoral b. Estuary c. Profundal d. Limnetic e. None of these choices.

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Medicine must respond with new drugs and vaccinations to the slow evolution of disease-causing

organisms such as bacteria and viruses. __________________ Indicate whether the statement is true or false.

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Van der Waals interactions

A) are another name for hydrogen bonds. B) occur when temporary dipoles within molecules form that are not the result of hydrogen bond to O, N, or F atoms. C) are responsible for the repulsion between hydrophilic and hydrophobic compounds. D) are stronger than either hydrogen bonds or ionic bonds. E) exhibit a force of repulsion that serves to destabilize molecules.

Biology & Microbiology