The basic unit of life is:
A. Atom
B. Water
C. Cell
D. Chemical level of organisation
Correct Answer:- C. Cell
Explanation:- The basic unit of life is **the cell**.
This is a foundational principle in biology, known as the **cell theory**, which states:
1. All living organisms are composed of one or more cells.
2. The cell is the basic structural, functional, and biological unit of all known living organisms.
3. All cells arise from pre-existing cells (via cell division).
Key points:
– Even the simplest organisms (like bacteria) are made of at least one cell.
– Complex organisms (like humans, plants, or animals) are made of trillions of specialized cells.
– Viruses are not considered living organisms by most biologists because they cannot carry out life processes independently and lack cellular structure.
So, universally accepted answer: **the cell**.