Question

who expanded cell theory in1855​

Answer 1

Answer

Rudolf Virchow expanded the cell theory in 1855 as "omnis cellula e cellula" i.e. all cells arise from pre - existing cells , just an animal arises only from an animal and a plant only from a plant.

Modern cell theory -

$\longrightarrow$It is also known cell doctrine or cell principle.

$\longrightarrow$All living organism are made up of cells having cytosol, nucleus , organelles and a covering membrane.

$\longrightarrow$Cells are morphological and physiological units of all living organisms except virus.

$\longrightarrow$Function of living organisms are the sum total of activities of their cells.

$\longrightarrow$Cells can survive independently but organelles cannot.

$\longrightarrow$Any cell arises from pre - existing cells.

$\longrightarrow$It is unit of structure, function and heredity.

$\longrightarrow$Life exist in cells.

$\longrightarrow$Growth of an organism is due to increase in size and number of cells.

Thanks

Answer 2

Answer:

Rudolf Virchow

Explanation:

(a) Rudolf Virchow (1821–1902) popularized the cell theory in an 1855 essay entitled “Cellular Pathology.”

(b) The idea that all cells originate from other cells was first published in 1852 by his contemporary and former colleague Robert Remak (1815–1865).