Final answer:
Ribosomes, DNA, cell membrane, and cytoplasm are common to all cells.
Step-by-step explanation:
a) Ribosomes: Ribosomes are cellular structures involved in protein synthesis. They are found in all types of cells, from bacteria to human cells.
b) DNA: DNA is the genetic material that carries information for the development, functioning, and reproduction of all living organisms. It is present in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells.
c) Cell Membrane: The cell membrane is a selectively permeable barrier that surrounds the cell. It regulates the movement of substances into and out of the cell and maintains its internal environment.
d) Cytoplasm: Cytoplasm is a gel-like substance that fills the cell and surrounds the organelles. It contains various molecules, including enzymes, nutrients, and ions, and serves as the site for many cellular processes.
Learn more about Common features of cells