Question

The cell arises from pre-existing cell was stated by

A. Haeckel

B. Virchow

C. Hooke

D. Schleiden

Answer 1

Hint: The cell theory explains the fundamental properties of all cells. Matthias Schleiden, Theodor Schwann, and Rudolf are the three scientists who contributed to the growth of cell theory.

Complete answer

First we should know about the cell to answer this question. A cell is a living thing's smallest unit, which is the central building block of all life. A living being is considered an organism, because it's composed of either one cell (ex- bacteria) or multiple cells (ex- a human one). The cells are the essential building blocks of all life. Multiple cells of one kind that interlink with each other and conduct a common tissue function; many tissues join to form an organ and several organs that form an organ system.

Now, let us find the solution from the options- 

1. In 1838 the cell theory was postulated by Matthias Schleiden and Theodor Schwann. It covers the following items- 

Both living beings consist of one or more of these cells. 

The cell is the most important unit of life.

2. In 1855, the third was introduced by Rudolf Virchow, who stated: "Omnis cellula e cellula" meaning that all cells arise from pre-existing cells.

Thus, the correct answer is option (B) i.e. Virchow.

Note: The research scientist Robert Hooke invented the word "cell" in a 1665 paper called Micrographia for the box-like structures he found while observing cork tissue via a lens. Van Leeuwenhoek had identified bacteria and protozoa in the 1670s.