Question

all living organisms are composed of
a. at least 100 cells.
b. one or more cells.
c. at least three cells.
d. only one cell.

Explanation:

The cell theory states that all living organisms are composed of one or more cells. Unicellular organisms (like bacteria, some protists) are made of a single cell, while multicellular organisms (like plants, animals) are made of multiple cells. Option A is incorrect as many organisms have fewer than 100 cells (e.g., unicellular organisms). Option C is incorrect as unicellular organisms have only one cell. Option D is incorrect because multicellular organisms have more than one cell. So the correct option is B.

Answer:

B. one or more cells.