Which part of the cell can be used to determine the cell is eukaryotic and prokaryotic?

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent

When ash and dust begin to settle on the ground, they eventually become compacted by

Polar zones are cold and tend to be dry because of a pressure system of cold. low high