AP BIOLOGY

Detailed explanation-1: -All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms. The activity of an organism depends on the total activity of independent cells. Energy flow (metabolism and biochemistry) occurs within cells.

Detailed explanation-2: -Thanks to experimentation and the invention of the microscope, it is now known that life comes from preexisting life and that cells come from preexisting cells.

Detailed explanation-3: -New cells are created from existing cells through a process referred to as the cell cycle. One cell can make a copy of itself and form two new daughter cells. There are two major tasks that have to happen every cell cycle. First, cells have to make an exact copy of their DNA.

Detailed explanation-4: -Schleiden and Schwann proposed spontaneous generation as the method for cell origination, but spontaneous generation (also called abiogenesis) was later disproven. Rudolf Virchow famously stated “Omnis cellula e cellula”… “All cells only arise from pre-existing cells.

Detailed explanation-5: -All living things are made up of cells. Cells are the smallest units (or most basic building blocks) of life, and all cells come from preexisting cells through the process of cell division. Life cannot be created in a laboratory.