Bell Work Draw a jail cell Draw an apartment complex or resort How are these like a plant cell? Cell Wall Nucleus Vacuole Chloroplast

Cells may be the basic unit of life …but we didn’t always know about them.

Development of Cell Theory

Zacharias Jansen 1595 - Developed the first compound microscope Allowed for greater magnification

Robert Hooke 1665 – Looked at cork under a microscope. First to use the term “cells” Looked like tiny cells/rooms in a monastery.

Anton van Leeuwenhoek 1674 – Discovered tiny organisms living in water. “animalcules” The “Father of Microbiology” Tiny organisms exist that we can’t see. Even in the water we drink.

Matthias Schleiden 1838 – Determined plants are made of cells.

Theodor Schwann 1839 – Determined animals are made of cells.

Rudolph Virchow 1855 – All cells come from other existing cells

Three Points of Modern Cell Theory All living things are made of cells. Cells are the basic units of structure and function in living things. New cells come from other cells. The Weird History of Cell Theory

Prokaryote Eukaryote

Unique Characteristics of Prokaryotes Means “before nucleus” All single celled organisms DO NOT have a nucleus to contain their DNA Very few internal structures All bacteria are prokaryotes Unique Characteristics of Prokaryotes

Unique Characteristics of Eukaryotes Means “true nucleus” Have a nucleus Complex structure – many internal structures (organelles) Can be a single cell or multicellular organisms All animals and plants are Eukaryotes

Shared Characteristics They have a Cell Membrane Contain DNA They show all characteristics of life Shared Characteristics

Major Types of Cells All Cells Prokaryotes Eukaryotes

Kahoot Go to: https://kahoot.it/#/ Enter the Code I give you Enter your name Once we start, select which answer you think is correct (this is not for a grade)

Next Up… Grab the textbook that corresponds with your seat number Turn to page 74 Color in the two cells using the specific colors indicated Then, on the back define the words at the bottom of the front of the page

Organelle Vocabulary Cytoskeleton Nucleus Endoplasmic Reticulum Ribosomes Golgi Apparatus Vesicles Mitochondria Vacuole Lysosomes Centrioles Cell Wall Chloroplasts