Question

Cell theory was formulated by

• A. Schwann and Robert Brown
• B. Schleiden and Schwann
• C. Robert Hook and Robert Brown
• D. Schleiden and Robert Brown

Answer 1

The Correct Option is B

The correct answer is:

Option 2: Schleiden and Schwann

Explanation:

The Cell Theory was formulated by Matthias Schleiden and Theodor Schwann in the early 19th century. Their key contributions were:

Schleiden proposed that all plants are made up of cells.

Schwann extended this idea to animals, proposing that all animals are also composed of cells.

Together, they laid the foundation for the Cell Theory, which states that:

All living organisms are made of cells.

The cell is the basic unit of structure and function in living organisms.

All cells arise from pre-existing cells.

Thus, Schleiden and Schwann are credited with formulating the Cell Theory.

Answer 2

The cell theory, a fundamental concept in biology, was formulated by:

Schleiden and Schwann

Here's why:

• Matthias Schleiden (a botanist) examined plant tissues and concluded that all plants are composed of cells.
• Theodor Schwann (a zoologist) studied animal tissues and came to a similar conclusion, that all animals are composed of cells.
• Together, Schleiden and Schwann proposed the first two tenets of the cell theory. Later, Rudolf Virchow added the third tenet.