AP BIOLOGY

Detailed explanation-1: -It states that: All living organisms are made up of cells. Cells are the smallest units in a living organism that can perform all the functions of life. Rudolf Virchow in 1858 said “Omnis cellula-e-cellula", which means that all cells arise from the pre-existing cells only.

Detailed explanation-2: -The first part states that all organisms are made of cells. The second part states that cells are the basic units of life. These parts were based on a conclusion made by Schwann and Matthias Schleiden in 1838, after comparing their observations of plant and animal cells.

Detailed explanation-3: -Complete answer: In 1858, Rudolph Virchow observed the process of cell division and claimed that cells only arose from the division of pre-existing cells. He stated in his cell theory that all living organisms are made up of single or multiple cells.

Detailed explanation-4: -1) All organisms are made of cells. 2) All existing cells are produced by other living cells. 2) All existing cells are produced by other living cells. 3) The cell is the most basic unit of life.

Detailed explanation-5: -The correct option is C All cells are surrounded by cell wall.