HORTICULTURE

Detailed explanation-1: -Cell theory also states that cells are the basic functional unit of living organisms and that all cells come from other cells. Although this knowledge is foundational today, scientists did not always know about cells. The discovery of the cell would not have been possible if not for advancements to the microscope.

Detailed explanation-2: -Later, in 1858, the German doctor Rudolf Virchow observed that cells divide to produce more cells. He proposed that all cells arise only from other cells.

Detailed explanation-3: -All cells come from pre-existing cells by cell division. Schwann also proposed “Free Cell Formation” or spontaneous generation of cells-this was before Pasteur’s definitive experiments. Modern Cell Theory Also States: Life’s chemical processes, such as metabolism, occur inside of cells.