Question

select the three components of the cell theory devised in the mid-1800s.

the cell is the fundamental unit of all life.
all cells can arise from spontaneous generation.
all organisms are made of one or more cells.
all cells have nuclei.
all cells originate from preexisting cells.

Explanation:

The cell theory (mid - 1800s) has three main components:

1. The cell is the fundamental unit of all life. This is a core idea of cell theory, as cells are the basic building blocks of living things.
2. All organisms are made of one or more cells. Whether an organism is unicellular (like bacteria) or multicellular (like plants and animals), it is composed of cells.
3. All cells originate from preexisting cells. This disproved the idea of spontaneous generation; cells come from other cells through processes like cell division.

The option "All cells can arise from spontaneous generation" is incorrect as cell theory disproved spontaneous generation. The option "All cells have nuclei" is incorrect because prokaryotic cells (e.g., bacteria) do not have a nucleus, and the original cell theory did not state this.

Answer:

• The cell is the fundamental unit of all life.
• All organisms are made of one or more cells.
• All cells originate from preexisting cells.