CELLS

Groups• 1s- pg 30-31

Compare and contrast multi-cellular and uni-cellular.• 2s- pg 32-33

How were cells discovered and explain the cell theory.

• 3s pg 34-35Compare and contrast the major differences between plant and animal cells.

What feature typically makes plant cells boxy looking?

• 4s Pg 38-39Explain how multi-cellular organisms grow. Why can a cell only get so large???

What is a cell?

* The smallest unit that can carry out the activities of life!

* The building blocks of all life!

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Jobs of cells

• Even though they are tiny, each cell has everything it needs to survive and reproduce

• Each part of the cell has a special job to do!

DNA

Nucleus

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Cell Theory1.All living things are made of

one or more cells.

2.Cells are the basic unit of living things.

3.All cells come from existing cells.

UnicellularONLY 1 cell that performs all jobs necessary to sustain the life of the cell

http://www.youtube.com/watch?v=gKNzzxuz6uk&NR=1

Multi-CellularHas 2 or more cells that have specialized jobs

http://www.youtube.com/watch?v=RaAM8qQcs6E

Amoeba Elodea

2 Types of cells

Plant Animal

Animal cellAnimal cells are eukaryotes (have a nucleus)

Do NOT have a cell wall or chloroplast

Millions of different types

Can’t make their own food

Have chloroplast and a cell wall

Plant cells are eukaryotes (have nucleus)

Plant cells make there own food through photosynthesis

Plant Cell

Growing…• As multi-cellular

organisms grow, the cells increase in number!

• http://www.youtube.com/watch?v=rgLJrvoX_qo&feature=related

• Chromosomes have all the information to divide

Why so small????To stay a live,

cellsMust take in

oxygenAbsorb foodRelease waste

Big Cell =1. Need more food!

2. Too big to get rid of waste in time!

3. Big Pop! It’s not comin’ back!

http://www.youtube.com/watch?v=TdMIsCF_7p0&feature=related

Journal….

1. Explain the difference between multi-cellular and unicellular (slide 6)

1. Describe the difference between a plant and an animal cell. (slide 7)

2. How do multi-cellular organisms grow? Why? (slide 10)

CELLS

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