Answer: False
Explanation: You're supposed to have numerically more smaller units than bigger units, since a lot of these smaller units are combined to create a single larger unit.
The answer for that is cell body. It goes in the blank.
The best estimate for Earth's age is based on radiometric dating of fragments from the Canyon Diablo iron meteorite. From the fragments, scientist calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years.
That would be false. A catacomb is an ancient underground cemetery.
exact meaning: an underground cemetery consisting of a subterranean gallery with recesses for tombs, as constructed by the ancient Romans.