Students learn that living things are made of cells and nonliving things are not made of cells. The students have to design an investigation to test these ideas.
Which three ideas should the students consider to design the best investigation?
A.
Find ten adults, and ask them if they believe that all living things are made of cells.
B.
Look at samples of things known to be nonliving under the microscope to see if they have cells.
C. Observe one-celled organisms to see if they show characteristics of life, such as feeding behavior.
D. Look at samples of things known to be alive under the microscope to see if they are made of cells.
E.
Count the number of cells seen in a sample under the microscope to see how many cells there are.