Which structure would you not find in a prokaryotic cell?

Nucleus

Explanation:

The prokaryotic cells are very simple and their dispersed genetic material is the result of the lack of a membrane called the library, which delimits the nucleus in other cells, that is, the prokaryotic cells have no nucleus. In addition to the lack of library, prokaryotic cells do not have membranous cell organelles such as mitochondria, plastids, endoplasmic reticulum and golgiense complex. Importantly, they have ribosomes, and they are much smaller than those found in other cells.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

your answer is "the 1950's"