Answer:
B.The scientists should look for samples that do not have a nucleus or cell membrane when viewed under the microscope.
Step-by-step explanation:
According to the cell theory, all living things are composed of at least one cell. In consequence, cells are considered to be the fundamental units of life. All cells are surrounded by a cell membrane, which is a lipid bilayer that acts to transport nutrients into the cell and waste products outside the cell, thus separating the cell from its external medium. Cell theory also states that cells always come from other cells.