EQ: How was the cell theory EQ: How was the cell theory developed?developed?

Do-Now: Use pages 69-Do-Now: Use pages 69-72 to answer the 72 to answer the following question. Are following question. Are all cells exactly alike? all cells exactly alike? Why or why not? Be Why or why not? Be prepared to defend your prepared to defend your answer.answer.

Introduction to CellsIntroduction to Cells

Discovery of the cellDiscovery of the cell

1665-Robert 1665-Robert HOOKE saw the HOOKE saw the cell walls of cork cell walls of cork and called them and called them “CELLS”“CELLS”

1673 Anton van LEEUWENHOEK saw the first living cells in a drop of water – “little animals”

3 Discoveries that led 3 Discoveries that led to the Cell Theoryto the Cell Theory 1838 Matthias SCHLEIDEN

concluded all plants were composed of cells

1839 Theodor SCHWANN concluded all animals were composed of cells

1855 Rudolf VIRCHOW observed cell division.

The Cell Theory (3 The Cell Theory (3 parts)parts) All living things are composed

of cells Cells are the basic units of

structure and function in an organism

Cells come only from the reproduction of existing cells

Cell DiversityCell Diversity

Not all cells are alikeNot all cells are alike Sizes and shapes vary for Sizes and shapes vary for

structure and functionstructure and function

1/11/121/11/12 Do-Now: Complete the GRECHO warm Do-Now: Complete the GRECHO warm

up on the back of your Cell Theory up on the back of your Cell Theory Notes from Yesterday. Notes from Yesterday.

1.1. We have discussed 5 scientists so far. We have discussed 5 scientists so far. List their names & what they did.List their names & what they did.

2.2. List the 3 parts of the cell theory.List the 3 parts of the cell theory.→→notebook, paper, pencilnotebook, paper, pencil Finish Intro to Cells; p169, 7-1 VocabularyFinish Intro to Cells; p169, 7-1 Vocabulary Cell Theory QuizCell Theory Quiz Pretest; Cell Structure & Function Tree Map Pretest; Cell Structure & Function Tree Map

(174-183(174-183

Cells contain a variety of internal structures called ORGANELLES.

ORGANELLE –a cell component that performs specific functions for the cell

The 2 main types of The 2 main types of cells:cells: PROKARYOTES-PROKARYOTES-cells without a

nucleus or membrane-bound organelles, have circular genetic material

Bacteria are the ONLY examples

Types of cells, cont.Types of cells, cont.

EUKARYOTES – cells that have a nucleus and membrane bound organelles.

Plants, animals, protists & fungi are examples

Ticket to LeaveTicket to Leave

Who were the three scientists to Who were the three scientists to develop the cell theory?develop the cell theory?

What are the three parts of the What are the three parts of the cell theory?cell theory?

What are the two main types of What are the two main types of cells?cells?

8/12/118/12/11 Do-Now: Have out the “Prefix/Suffix/Root Do-Now: Have out the “Prefix/Suffix/Root

vocabulary on your desk.vocabulary on your desk.

1.1. Contrast prokaryotes & eukaryotes. List Contrast prokaryotes & eukaryotes. List an example of each.an example of each.

2.2. What do the following What do the following prefixes/suffixes/roots mean?prefixes/suffixes/roots mean?

a.a. Uni-Uni- b. Multi-b. Multi- c. Pro-c. Pro- d. Eu-d. Eu-

e. Auto-e. Auto- f. Hetero-f. Hetero- g. Bio-g. Bio- h. –ologyh. –ology→→notebook, paper, pencilnotebook, paper, pencil Pretest; Cell Structure & Function Tree Pretest; Cell Structure & Function Tree

Map (174-183); Animal & Plant CellMap (174-183); Animal & Plant Cell