1. Do Now
Describe the differences/similarities you see between these two cells (3 of each).

2. Lesson Overview
7.1 Life is Cellular

3. Early Microscopes
Robert Hooke (1665) used a compound microscope to look at a thin slice of cork, a plant material.
Anton van Leeuwenhoek examined pond water and other things, including a sample taken from a human mouth. He drew the organisms he saw in the mouth—which today we call bacteria.

4. The Cell Theory The Cell Theory states:
1. All living things are made up of cells.
2. Cells are the basic units of structure and function in living things.
3. New cells are produced from existing cells.

5. Microscopes Light microscope - uses light and 2 lenses.
Electron microscopes - beams of electrons focused by magnetics.
There are two major types of electron microscopes:
transmission: 2-D images of the inside of a cell.
scanning: 3-D images of the cell surface.

6. Prokaryotes and Eukaryotes
ALL CELLS HAVE THESE IN COMMON…
- All cells contain DNA.
- All cells are surrounded by a thin, flexible barrier called a cell membrane.

7. Prokaryotes and Eukaryotes
The nucleus is a large membrane-enclosed structure that contains the cell’s DNA.
Eukaryotes are cells that enclose their DNA in nuclei.
Prokaryotes are cells that do not enclose DNA in nuclei.

8. Prokaryotes Prokaryotic cells are smaller and simpler.
The organisms we call bacteria are prokaryotes.

9. Eukaryotes Eukaryotic cells are larger, more complex, and specialized.
There are many types of eukaryotes: plants, animals, fungi, & protists.

10. HW School Wires Video and questions on prokaryotes vs eukaryotes
“prokaryotes and eukaryotes amoeba sisters” search on youtube
link on school wires

11. 1. leaf 2 paramecium 3. bacteria