Answer: they are made of one or more cells
Explanation:
I took a test on this a week ago
Osmosis is the process cells use to move water molecules in and out of the cell through the cell membrane .through osmosis the cell will lose or gain water molecules to become a
Equal to the concentration in their environment
Answer: thousands of years
Ans.
Unicellular organisms are those organisms that are made up of a single cell, while multicellular organisms are made of up more than one cell. During 17th century, a scientist could distinguish between an unicellular and a multicellular organism by using simple microscope, developed by Antony Van Leeuwenhoek. In the mid-20th century and 21st Century, a scientist could make distinction between unicellular and multicellular organisms, by using advance microscopy techniques, such as electron microscopy and electron microscopy.