34. The theory which states that all animals and plants are composed of cells and cell products is known as A.Cell Theory B.Atomic Theory C.Bohr's Theory D.None of the above
Answer: Option A Solution: By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. 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.
