3 cells
many
many cells acting as one organism
An organ is composed of one or more cells.
one or more cells.
One Large
The cell. An organism can be composed of one or many cells. Cells are composed of organelles, but organelles cannot function alone (with exceptions).
A flower is multicellular. This is because the entire flower is not composed of one cell, it is composed of many cells.
Multi-celled organisms are composed of many cells. Some examples are insects, mushrooms, horses, daisies, trees, etc.
Cells.
An insect has a nucleus in every one of its cells, since it is composed of Eukaryotic cells.
The Cell
No, rocks are not life. Cells are the basic unit of all life, composed of many many molecules. Matter that isn't alive, or wasn't once alive, is not made of cells. Rocks are composed of many molecules, so they could be referred to as multi-molecular, and often more than one element, but they are not composed of cells.