Question

1. what defines a cell as the basic unit of life?

its ability to exist independently of other cells
its large size and complexity
its ability to carry out all of life’s processes
its multicellular structure

Explanation:

• Option 1: Many cells are part of multicellular organisms and don't exist independently, so this is incorrect.
• Option 2: Cell size and complexity don't define it as the basic unit of life; some cells are small and simple yet still living.
• Option 3: Cells can carry out all life processes (like metabolism, growth, reproduction) which is why they are the basic unit of life. This is correct.
• Option 4: Unicellular organisms exist, and the basic unit is the cell (whether unicellular or part of multicellular), so multicellular structure isn't the defining factor.

Answer:

Its ability to carry out all of life’s processes (the third option)