HORTICULTURE

Detailed explanation-1: -All organisms have a common ancestor as indicated by the third postulate of the cell theory stated by Rudolf Virchow. He states that all cells arise from pre existing cells. This means that there must be one single ancestor cell which is divided to form new cells.

Detailed explanation-2: -Concept 7 All cells arise from pre-existing cells. For centuries people accepted the “spontaneous generation” of life from inanimate matter. When this long-standing myth was finally dispelled in the mid-1800s, it became clear that all life must arise from pre-existing life-via a process of reproduction.

Detailed explanation-3: -The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory.

Detailed explanation-4: -All cells process energy and nutrients. All cells use changes in its DNA to adapt to its environment. All cells contain a cytoplasm surrounded by a plasma membrane, DNA in the form of chromosomes and ribosomes.

Detailed explanation-5: -The third part of the cell theory definition states that all cells come from preexisting cells. This means that cells don’t just appear out of thin air (known as “spontaneous generation”). New cells are always made from current cells.