question_answer

DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 The bodies of living organisms are made of tiny units called cells. Cells can be seen only under microscope. Some organisms are made of only one cell. The cell is enclosed by a thin boundry, called the cell membrane. The smallest structural unit of a living organism is

A) a cell

B) a tissue

C) either a cell or a tissue

D) none of these