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The fin in “A” has a higher aspect ratio than the others and it is more efficient for continuous fast swimming.  The high aspect ratio is because its lobes are shorter but the fin has a higher surface area than those of other fins.  

This meeting decided that Vietnam would be divided after the French give up fighting to keep Vietnam as a colony.  The Northern portion would be communist and the Southern portion would be capitalists and democratic. 

Because of the lack of energy in the deep sea, many fishes have a reduced metabolism.

This treaty ended a war with Mexico, allowed the US to claim California, New Mexico and the Rio Grand border, and paid Mexico $15 million.

This man led the Mormons to settle in Utah after the death of Joseph Smith Jr.

Which pro-union territory joined the United States during 1863?

Which of the following is true about swimbladders?

Which signature program focused on being liberal with human beings and conservative with money?

Which of the following is a solution to deal with the reduced amounts of food in the deep-sea?

When luciferin (a substrate) and luciferase (an enzyme) react in the presence of O2, a flash of light is produced.