They have a cell membrane, they contain cytoplasm and can replicate themselves through the manner of mitosis.
Light is to find the distance between planets called light years.
A fish breathes by taking water into its mouth and forcing it out through the gills.
It uses unicellular cells.
The answer to this question would be endocytosis.
Endocytosis a process to bring outside material into cell. The word "endo" itself mean "inside". This material could be source of energy or microbes that need to be killed. It's opposite would be exocytosis. The word "exo" itself mean "outside".
Both of them is pretty similar because they use vesicle to transport the things that need to be moved.
