CK-12 Foundation
Ck 12: Common Parts of the Cell 1
[Free Registration/Login may be required to access all resource tools.] Online activity summarizes the cell theory, describes four parts all cells have in common, and the importance of the work of Robert Hooke and Anton van Leeuwenhoek.
CK-12 Foundation
Ck 12: Biology: Common Parts of the Cell
[Free Registration/Login may be required to access all resource tools.] Describes four parts all cells have in common.