Which feature is common to prokaryotic and eukaryotic cells?
organelles
cell nuclei
cell membranes
complex structures

Cell membrane

Explanation:

Eukaryotic cells contain membrane-bound organelles, for example, a nucleus. These types of cells can form plants, animals, insects or fungi. Prokaryotic cells do not contain membrane-bound organelles. Examples of these type of cells can be Bacteria.

So, cell nuclei is not a common feature because it is only fond in Eukaryotic cells. And also, there are other membrane-bound organelles besides the nucleus. Then, organelles and complex structures is not a common feature either.

The cell membrane is a biological semi-permeable membrane that surrounds the cell. Its protects it by allowing substances into the cell and keeping others out. It is found in both types of cells.

not only is it colder, it also becomes darker, less salty, and more dense.