Happy Wednesday Buffs!  Bellwork: Name at least two things Prokayotes and Eukaryotes have in common and at least two things that make them different.

Projects…  Are due one week from today.  After today you should have a good idea about what you want to do and should be making plans to get started.

There are many theories about how the first Eukaryotes emerged.  The Endosymbiotic Theory is the most widely accepted  The Endosymbiotic Theory states that the organelles of eukaryotes originated as a symbiosis between separate single-celled prokaryotes.

Break it down….  Endo = inside  Symbiosis = a beneficial relationship  Fat Tony:   Endo. Theory with Playdoh: 

Explains how organelles were most likely formed Also explains why organelles are membrane-bound

Endosymbiotic Theory Prokaryo tic Cell #1 Prokaryotic Cell #2 (mitochondria) Prokaryotic Cell #2 (chloroplast) NEW Eukaryotic Cell

Homework... color the cells A Cell Membrane B Cytoplasm C Mitochondria D Nucleus E Endoplasmic Reticulum F Golgi Apparatus G Ribosomes H Vacuoles I Cell Walls J Flagella

CUT it Up!! Foldable time…. Follow my Instructions

Cell Organelles and their Functions Page 11: Essential question: What are the organelles in a cell and what do they do?

Cells  Cells are the basic unit of all living things.  IF IT IS ALIVE, IT HAS CELLS!  Cell Theory:  All organisms are made up of one or more cells  The cell is the basic unit of all organisms  all cells come from cells

Two Types of Cells PROKARYOTE EUKARYOTE

A Cell Membrane B Cytoplasm C Mitochondria D Nucleus E Endoplasmic Reticulum F Golgi Apparatus G Ribosomes H Vacuoles I Cell Walls J Flagella

A. Cell Membrane:  holds the cell together and allows nutrients into the cell. A

B. Cytoplasm  the watery gel inside a cell.  It holds the ORGANelles. B

C. Mitochondria  ORGANelle that produces energy for the cell. C

D. Nucleus  The nucleus controls the cell.  It contains the cell’s DNA. D

E. Endoplasmic Reticulum  A network of membranes throughout the cytoplasm of the cell.  It helps to move materials around the cell  Can be smooth or rough. E

F. Golgi apparatus  Responsible for sorting, packaging, and shipping the proteins produced in the ER. F

G. Ribosomes  help in the synthesis of proteins.  Some ribosomes are found in the cytoplasm, but most are attached to the endoplasmic reticulum. G

H. Vacuoles  Vacuoles are spaces in the cytoplasm where food and chemicals are stored H

I. Cell Wall  Cell Walls are in plant cells and bacteria  They make the cell strong and rigid I

J. Flagella  Can be found in both prokaryotic and eukaryotic cells  Used for movement J