Determine if the given differential equation is exact.2y dy + 2x dx = 0

 The method of desalination in which seawater is forced against a semipermeable membrane at high pressure is called ____.

 Scientists can observe primary productivity in the ocean from space by measuring the ____.

Perform the operation. + + –

  Second to petroleum and natural gas, the most profitable physical resource recovered from the marine environment is ____.

  Which type of organism is responsible for harmful algal blooms, or HABs?

  One economical drawback of tidal power is that it ____.

 Most marine organisms have an internal temperature very close to that of their surroundings. They are known as ____ organisms.

 As a result of the increased size of cargo ships, many ships ____.

The farming of marine organisms for human use is called ____.