1. If a desk is flipped, do not touch it. Do not move desks.
Do Now: 2/27
WOD: MORASS (mah RASS) n.
anything that hinders, traps or overwhelms; low-lying, soggy ground
The MORASS surrounding the castle was ineffective during the dry season.
The jeep sank deep into the MORASS and could go no further.
The MORASS was too wet for gardening so we brought in some fill dirt.
If a desk is flipped, do not touch it.
Do not move desks.

2. Identify the following stages of mitosis:
1.) )
3.) )

3. 5. ) Mitosis creates ____________ daughter cells 6
5.) Mitosis creates ____________ daughter cells 6.) Describe how mitosis is important for your body. 7.) What happens to a cell during interphase?

4. REMINDER: Study Island assignment is due 3/11!
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5. KEY CONCEPT Many organisms reproduce by cell division.

6. Binary fission is similar in function to mitosis.
Asexual reproduction is the creation of offspring from a single parent.
Binary fission produces two daughter cells genetically identical to the parent cell.
Binary fission occurs in prokaryotes.
parent cell
DNA
duplicates
cell begins
to divide
daughter
cells

7. Environment determines what form of reproduction is most advantageous.
Asexual reproduction is an advantage in consistently favorable conditions.
Sexual reproduction is an advantage in changing conditions.

8. Think, Pair, Share!
STAND UP!
Move around the room for the duration of the music, when it stops, you must pause.
QUESTION:
How do mitosis and binary fission differ? How are they alike?

9. Some eukaryotes reproduce through mitosis.
Budding forms a new organism from a small projection growing on the surface of the parent.
bud
Hydra
Yeast

10. Fragmentation is the splitting of the parent into pieces that each grow into a new organism.
Vegetative reproduction forms a new plant from the modification of a stem or underground structure on the parent plant.

11. Chapter 5.5: KEY CONCEPT Cells work together to carry out complex functions.

12. Tissues are groups of cells that perform a similar function.
Multicellular organisms depend on interactions among different cell types.
vascular
tissue
leaf
stem
lateral
roots
primary
root
SYSTEMS
root system
shoot system
Tissues are groups of cells that perform a similar function.
Organs are groups of tissues that perform a specific or related function.
Organ systems are groups of organs that carry out similar functions.
CELL
TISSUE
ORGAN

13. Specialized cells perform specific functions.
Cells develop into their mature forms through the process of cell differentiation.
Cells differ because different combinations of genes are expressed.
A cell’s location in an embryo helps determine how it will differentiate.
Outer: skin cells
Middle: bone cells
Inner: intestines

14. Think, Pair, Share!
How are cells and tissues related?
Move again!
How are tissues and organs related?

15. Stem cells are unique body cells.
Stem cells have the ability to
divide and renew themselves
remain undifferentiated in form
develop into a variety of specialized cell types

16. Stem cells come from adults and embryos.
Adult stem cells can be hard to isolate and grow.
The use of adult stem cells may prevent transplant rejection.
The use of embryonic stem cells raises ethical issues
Embryonic stem cells are pluripotent and can be grown indefinitely in culture.
First, an egg is fertilized by a sperm cell in a petri dish. The egg divides, forming an inner cell mass. These cells are then removed and grown with nutrients. Scientists try to control how the cells specialize by adding or removing certain molecules.

17. The use of stem cells offers many currently realized and potential benefits.
Stem cells are used to treat leukemia and lymphoma.
Stem cells may cure disease or replace damaged organs.
Stem cells may revolutionize the drug development process.