All living things are made of cells. Cells are the basic unit of life. Cells come from other cells.

Schwann – animal cells 1839Schleiden – plant cells 1839Virchow – cell come from pre-existing cells

1855

Go to your journal page and review list.

REPRODUCE

The species would become EXTINCT.

Where do cells come from? All organisms begin as one cell. As you

learned last week, every cell contains organelles that have specific functions to carry on all of life’s processes. If reproducing is required for a species to continue, then cells must reproduce.

How do cells reproduce?

In unicellular (single celled) organisms, the cell divides to make new versions of itself.  In multicellular organisms, the cells divide and then specialize to become different structures such as heart, brain, lungs, etc.

Every day, your skin cells die and replace themselves by reproducing new ones. They do this by division.

This process of division is called

Mitosis. It occurs in multiple stages or phases. You will learn the details of this process in high school biology.

However, today, we are going to observe cells that are going through different stages of the reproductive process called Mitosis.

http://www.biologycorner.com/projects/mitosis/whitefish_embryo.html

http://www.biologycorner.com/projects/mitosis/onion_root.html

Whitefish Mitosis

Onion Root Tip Mitosis

1 2

3 4

5 6

Mitosis Lab Activity - View the slides of the Whitefish and the Root Tip Mitosis. Draw six different views of the cells in various stages of mitosis that you see.

Identify the stages of MITOSIS below.INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

CYTOKINESIS

1 2

3 4

5 6

Mitosis Lab Activity - View the slides of the Whitefish and the Root Tip Mitosis. Draw six different views of the cells in various stages of mitosis that you see.

Identify the stages of MITOSIS below.INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

CYTOKINESIS

1 2

3 4

5 6

Mitosis Lab Activity - View the slides of the Whitefish and the Root Tip Mitosis. Draw six different views of the cells in various stages of mitosis that you see.

Identify the stages of MITOSIS below.INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

CYTOKINESIS

1 2

3 4

5 6

Mitosis Lab Activity - View the slides of the Whitefish and the Root Tip Mitosis. Draw six different views of the cells in various stages of mitosis that you see.

Identify the stages of MITOSIS below.INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

CYTOKINESIS

1 2

3 4

5 6

Mitosis Lab Activity - View the slides of the Whitefish and the Root Tip Mitosis. Draw six different views of the cells in various stages of mitosis that you see.

Identify the stages of MITOSIS below.INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

CYTOKINESIS

1 2

3 4

5 6

Mitosis Lab Activity - View the slides of the Whitefish and the Root Tip Mitosis. Draw six different views of the cells in various stages of mitosis that you see.

Identify the stages of MITOSIS below.INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

CYTOKINESIS

1 2

3 4

5 6

Mitosis Lab Activity - View the slides of the Whitefish and the Root Tip Mitosis. Draw six different views of the cells in various stages of mitosis that you see.

Identify the stages of MITOSIS below.INTERPHASE

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

CYTOKINESIS

After completing this investigation, where would you say cells come from?How do cells reproduce?

After completing this investigation, where would you say cells come from? Cells come from other cells.

How do cells reproduce?

After completing this investigation, where would you say cells come from? Cells come from other cells.

How do cells reproduce?

Cells divide.