The diagram is a model of the structure of a certain type of cell. Like all models, the diagram is accurate in many ways but does not show all features or properties. For
example, the structure labeled 2 may take on a variety of sizes, depending on the amount
of water available to the cell. The structure labeled 4 occurs in different numbers in
different examples of the cell. It has a characteristic green color and is involved in energy
transformation.
B
Do all cells include the structure labeled 1?
A
Yes. The structure is the cell nucleus,
and it controls activities in all cells.
No. This structure is a cholorplast, and
it is found only in cells that perform
photosynthesis.
Yes. This structure is a mitochondrion,
and it generates ATP in all cells.
No. This structure is the cell nucleus,
and it is found only in eukaryotic cells.
D