Question

Statement 1: All cells arise from pre-existing cells.
Statement 2: All cells have a cell wall.

• A. Both the statements are correct.
• B. Only statement 1 is correct.
• C. Only statement 2 is correct.
• D. Both the statements are incorrect.

Answer 1

The correct option is B Only statement 1 is correct.

The cell theory was proposed by Matthias Schleiden (1838) and Theodor Schwann (1839), after studying plants and animal cells independently. It states that:

• All living organisms are made up of cells.
• Cells are the smallest units in a living organism that can perform all the functions of life.
• Rudolf Virchow in 1858 said "Omnis cellula-e-cellula", which means that all cells arise from the pre-existing cells only.

Cell wall is a rigid outer layer which is present in bacterial, fungal and plant cells, but not present in animal cells.