1. CELL CYCLE. Critical Question 1
CELL CYCLE Critical Question 1. Rank the amount of time a cell spends in each stage of the cell cycle from greatest to least amount of time (using the stage full titles). PAGE 42
2. Grab a Red, Blue, Green (colored pencil, marker, highlighter, etc.)
3. Discuss with your table.
How do you grow from a baby to an adult?

2. 7 Characteristics of Life
Composed of cells
Reproduction
Require Energy
Growth & Develop
Homeostasis
Environmental Response
Adapt & Change (Evolve)

3. KEY CONCEPT – write in your spiral Cells have separate phases of growth, reproduction, and normal functions.

4. Cell Cycle for Unicellular & Multicellular
amoeba
One-celled organisms
for asexual reproduction
Multi-celled organisms
for growth & development
for repair & replacement
starfish
Unicellular organisms
Cell division = reproduction
Reproduces entire organism& increase population
Multicellular organisms
Cell division provides for growth & development in a multicellular organism that begins as a fertilized egg
Also use cell division to repair & renew cells that die from normal wear & tear or accidents

5. Cells constantly divide to replace old cells
Cell Lifespans:
Stomach human 2 to 9 days

6. Cell Cycle or Cell Division
At this moment, millions cells in your body are dividing!
This is known as the cell cycle!!

7. Cell Cycle
Three Stages:
1. Interphase
2. Mitosis &
3. Cytokinesis

8. 3 Stages Interphase: Phase that prepares cell for division Gap 1
1. G1 Phase
Cell growth
2. S Phase
DNA Replicates
Synthesis
3. G2 Phase
Gap 2
Cell Growth

9. Main Stages of Cell Cycle are Gap 1, Synthesis, Gap 2, and Mitosis then Cytokinesis.
Gap 1 (G1): majority of cell growth, organelles replicate and normal functions
DNA synthesis (S): DNA copied (doubled)
Gap 2 (G2): additional growth
Mitosis (M): includes division of the cell, it’s organelles, and cytoplasm (cytokinesis) creating 2 NEW CELLS
Mitosis occurs only if the cell is large enough and the DNA undamaged.

10. Signal initiates Cell Cycle!! G1Phase: Growth
nucleus

11. S Phase: DNA Replication
nucleus
cell
DNA in chromosomes

12. G2Phase: Growth
cell
nucleus

13. STAGE 2: MITOSIS . STAGE 3: CYTOKINESIS
*Mitosis is divided into four phases: PROPHASE, METAPHASE, ANAPHASE & TELOPHASE.
Final stage in which cytoplasm divides and organelles are distributed into each new cell.
(Usually begins during TELOPHASE of mitosis)

14. Cytokinesis in Animal & Plant Cell
Animal Cells vs.
Cell membrane squeezes
Plant Cells
Cell plate forms across middle of cell

15. Unicellular Organisms = Binary Fission
Binary fission occurs in prokaryotes.
Binary fission produces two daughter cells genetically identical to the parent cell.
parent cell
DNA
duplicates
cell begins
to divide
daughter
cells

16. CELL CYCLE. Critical Question 1
CELL CYCLE Critical Question 1. Rank the amount of time a cell spends in each stage of the cell cycle from greatest to least amount of time (using the stage full titles).

17. CELL CYCLE Worksheet

18. Mitosis (2nd Stage of Cell Cycle)
Get out spiral,
Page 44
Title Notes: Mitosis (Stage 2 of Cell Cycle)
Write Critical Questions
Why is it important for cells to undergo Mitosis?
Turn to page 41
Work the cell cycle worksheet
To create two new identical cells from a parents cell that helps an organism reproduce, grow or develop, and repair themselves.

19. Mitosis (2nd Stage of Cell Cycle)

20. Mitosis also occurs in a series of steps!

21. Stages of Cell Cycle: I. P.M.A.T.C. Stages of Mitosis: P.M.A.T.C.

23. Please Make Another Two Cells
I.P.M.A.T.C.
Overview of mitosis
prophase
interphase
Please Make Another Two Cells
cytokinesis
metaphase
anaphase
telophase

24. Answer the Critical Question