Presentation on theme: "The cell is the basic unit of living things."— Presentation transcript:
1The cell is the basic unit of living things. Notes E 1.1The cell is the basic unit of living things.
2Living things are different from nonliving things. Organisms’ Life Processes:Are organizedGrow and developRespond to their environmentAre able to reproduce
3All organisms need: Energy Certain Materials Living Space (All energy used by life on Earth comes directly or indirectly from the Sun)
4All living things are made of cells. Cell=smallest unit of life that can perform basic activitiesMulticellular organisms have specialized cells that, together, meet basic needs.
5The microscope led to the discovery of the cell. Robert Hooke and Anton van Leeuwenhoek—first to describe cells (1660s and 1670s)Microscope=the new technology that led to their discoveries
6Cells come from other cells. Cell Theory (1850s):All living things made of cellsCells carry out life functionsCells come only from other cells
7The cell Theory is important to the study of biology. Theory=an explanation of what is observed, must be supported by evidenceLouis Pasteur used Cell Theory as a foundation for his studies:Bacteria cause food spoilage, sour milk, diseases.Living things don’t arise by spontaneous generation.