Question

The concept of “Omnis cellula-e-cellula” regarding cell division was first proposed by-
A. Rudolf Virchow
B. Theodor Schwann
C. Schleiden
D. Aristotle

Answer 1

Hint: With this approach, this German scientist and biologist opened the field of cellular pathology. He said all illnesses include changes in normal cells, that is, essentially all pathology is cellular pathology.

Complete answer:
Option A is correct. In the late 19th century, the German biologist and pathologist Rudolf Virchow is also known as "the pioneer of social medicine" and "father of modern pathology" stated the theory "Omnis cellula-e-cellula" implies that "each cell is created from a pre-existing cell by division'.

Option B is incorrect. M. J. Schleiden (1838) and Theodore Schwann (1839), two German biologists proposed the cell theory. All living beings, according to the theory, are made of cells, which are the smallest structures that can be considered 'living'. An organism's basic unit is cells and "All tissues are composed of individual cells" was asserted by Schleiden.

Option C is incorrect. Along with Theodor Schwann and Rudolf Virchow, Matthias Jakob Schleiden was a German botanist and co-founder of cell theory. He also noted the significance of the cell nucleus that the Scottish botanist Robert Brown discovered in 1831 and sensed its relation with cell division.

Option D is incorrect. Aristotle's zoology and species classification were his biggest achievement to biological history, the first recognized attempt to classify animals by behavior and, most importantly, by physiological similarities and differences.

So, the correct answer is Option A.

Note:R. Virchow used his hypothesis to lay the foundations for cellular pathology and his discovery that all living cells derive from pre-existing cells ('Omnis cellula-e-cellula'), which have been added as a concept to the cell theory. His work has led scientists to be able to more reliably identify diseases.