Which of these is not true of cells?
a. they are much like empty rooms.
b. they were first discovered in the 1600s.
c. they can be found in pond water.
d. they contain a huge array of working parts.

A. They are much like empty rooms. 
In fact, cells are more comparable to bustling cities, always moving and using so many important parts in order to meet their needs. 

Cells were discovered in 1665 by Robert Hooke. They can be found in pond water (in large amounts, in fact). Finally, as I stated above, they contain a plethora of working parts.