2 Introduction to Cells All life forms on our planet are made up of cells. In ALL organisms, cells have the same basic structure. The scientist Robert Hooke was the first to see cells under a microscope.
3 Cell Theory 1. All living things are made up of one or more cells. 2. Cells are the basic unit of structure and function in organisms. 3. All cells arise from existing cells.
4 Looking at Cells Cells vary greatly in size and in shape. There are over 200 different types of cells in your human body. Brain cells look and function differently than muscle cells, although their parts on the inside of the cell are the same. Although these cells are somewhat different, they are all very SMALL!!!
5 Cell Size All substances (FOOD) that enter or leave a cell must pass through the surface of the cell. Substances must move farther to reach their destination if the cell is LARGE. Cell size must be limited by a cells surface area-tovolume ratio.
7 Prokaryotic and Eukaryotic Cells Although ALL cells are very similar in structure and function, they are not all exactly the same. Single celled organisms are made of prokaryotic cells, while multicellular organisms (YOU) are made of eukaryotic cells.
8 Prokaryotic Cells A prokaryotic cell is simple, they make up UNICELLULAR organisms (single celled) (bacteria) The genetic material is a single loop of DNA floating in the cytoplasm. Ribosomes and enzymes share the cytoplasm with the DNA. A cell wall surrounds the plasma membrane, this is similar to plant cells, but nothing like an animal cell.
9 A Prokaryotic Cell
10 Prokaryotic Cells
11 Eukaryotic Cells Eukaryotic Cells are cells found in multicellular organisms (YOU) Eukaryotic Cells are more complex than prokaryotic cells. Because of their complex organization, eukaryotic cells can carry out more specialized functions than prokaryotic cells can. Unlike the prokaryotic cell, the DNA in a eukaryotic cell is found in the nucleus. All eukaryotic cells have membrane bound organelles (you ll learn what these are very soon)
12 A Eukaryotic Cell
13 A Eukaryotic Cell
14 DNA inside of a eukaryotic cell is found in the : Nucleus Ribosome Cytoplasm Mitochondria
15 Bacteria are made up of: Eukaryotic Cells Prokaryotic Cells
16 Animal Cells are made up of: Eukaryotic Cells Prokaryotic Cells
17 Plant Cells are made up of: Eukaryotic Cells Prokaryotic Cells
18 A cell is discovered that contains a nucleus and no flagella. It is most likely a: Eukaryotic Cell Prokaryotic Cell
19 Identify the following cell type Prokaryotic Cell Eukaryotic Cell
20 Identify the following cell Type: Eukaryotic, Animal Eukaryotic, Plant Prokaryotic, Bacteria Prokaryotic, Plant
21 Both prokaryotic and eukaryotic cells contain A nucleus DNA Mitochondria Nuclear envelope
22 Inside the Prokaryotic Cell DNA is located in an area of the cytoplasm called the NUCLEOID. THIS IS NOT A NUCLEUS! It is NOT bound by a membrane! Small hair-like structure are attached to the outside of the prokaryotic cell called FIMBRIAE or PILI. Allows bacteria to attach to some surfaces.
23 Inside the Prokaryotic Cell The membrane that immediately surrounds the cytoplasm is known as the PLASMA MEMBRANE. Controls what enters and leaves the cell. (INNER LAYER) Bacteria also have a CELL WALL that lies just outside the PLASMA MEMBRANE. (MIDDLE LAYER) A jelly-like CAPSULE forms the outer coating of many prokaryotes. (OUTER LAYER)
24 Inside the Prokaryotic Cell RIBOSOMES: Make Proteins. These structures will be talked about more inside the Eukaryotic Cell. Some bacteria have the ability to move around and are propelled by FLAGELLA!
25 Prokaryotic Cell DNA is located in an area of the cytoplasm called the: Nucleus Ribosome Plasma Membrane Nucleoid
26 In the prokaryotic cell, ribosomes make: Carbohydrates Nucleic Acids Lipids Proteins
27 Inside the Eukaryotic Cell The Cytoplasm The region of the cell within the plasma membrane. The Cytoskeleton A web of protein fibers The cytoskeleton supports the cell like bones support your body
28 Inside the Eukaryotic Cell The Nucleus Houses the DNA The brains of the cell Tells the cell what to do! Nuclear Envelope A double layered membrane that surrounds the nucleus Ribosomes These structures take info from DNA and link amino acids together. What do we create when we link amino acids together?
29 Inside the Eukaryotic Cell The Endoplasmic Reticulum A system of internal membranes Rough ER-Ribosomes attached send vesicles with proteins to the Golgi Apparatus and then to other parts of the cell Has Ribosomes attached to it so that after proteins are produced, they can send them out of the cell. Smooth ER produces enzymes that break down LIPIDS, and detoxify drugs. Secretes sex hormones Stores Calcium ions
30 Endoplasmic Reticulum (ER)
31 Inside the Eukaryotic Cell Cont. The Golgi Apparatus We can think of the golgi apparatus as a center of manufacturing, warehousing, sorting, and shipping. Often receives proteins from ER and transports them around the cell.
32 Inside the Eukaryotic Cell Cont Lysosomes Contains specific enzymes that break down large molecules. Can digest food to provide nutrients for the cell. Digests waste products in the cell and helps send them out.
33 Inside the Eukaryotic Cell Cont Mitochondria The power house of the cell The MIGHTY MITOCHONDRIA!!! Takes sugar molecules and makes ATP (energy) Do muscle cells or skin cells contain more mitochondria organelles?
34 Inside the Eukaryotic Cell Cont. Microfilaments Similar to the cytoskeleton, but are mainly involved in CELL DIVISION. These tubes grow out of CENTRIOLES Centrioles Located in a region of the cell called the centrosome. Centrioles produce the microfilaments that organize the cell before CELL DIVISION.
36 Inside the Eukaryotic Cell Cont Central Vacuole ONLY FOUND IN PLANT CELLS! Stores WATER, ions, nutrients, waste Chloroplasts ONLY FOUND IN PLANT CELLS! Uses light energy from the sun to make sugar. Cell Wall ONLY FOUND IN PLANT CELLS!, also prokaryotic Cells! Provides stability for the cell.
37 A Plant Cell.
38 The Plasma Membrane So important that it gets a slide to itself! Also known as the CELL MEMBRANE. A double layered phospholipid membrane that separates the inside of the cell from the outside of the cell. The plasma membrane is selectively permeable. What do you think selectively permeable means? The fluid mosaic model describes the plasma membrane. (This is discussed in the Cell Function notes.)
39 The Fluid Mosaic Model
40 Naomi adds cycloheximide to cells grown in a test tube. Within minutes, she identifies short, incomplete segments of proteins in the cell. On which organelle does cycloheximide act? Endoplasmic Reticulum Golgi Apparatus Nucleus Ribosome
41 After Harrison adds a chemical to cells, proteins begin to accumulate in the endoplasmic reticula. The chemical prevents movement of proteins from the endoplasmic reticulum to which organelle? Golgi Apparatus Lysosome Mitochondrion Ribosome
42 The presence of which structure indicates that cells are NOT photosynthetic bacteria. Cell Wall Ribosome Nucleus Cytoplasm
43 Cellular Division Cells divide by the process of mitosis. One cell becomes two identical daughter cells. These daughter cells are exactly the same Have exactly the same genetic material.
44 The Cell Cycle
45 Cell Cycle Out of Control Cells have genes (DNA) that regulate the cell cycle. Some of these genes tell the cell cycle to stop and some of these genes tell the cell cycle to proceed. If either of these genes are mutated, it causes the cell cycle to go to fast. When this occurs, the cell is CANCEROUS! This is a loss of control of the cell cycle.
46 Cancer When cell growth and mitosis is out of control tumors develop. When a cancer tumor develops, cells from the tumor can break off, enter the blood stream, and move to other parts of the body The process by which cancer spreads is called metastasis.
47 Cancer Pictures CAUTION: THESE PICTURES ARE EXTREMELY GRAPHIC. If you are comfortable viewing actual pictures of cancerous lesions, click here.
48 The Steps of Mitosis! Interphase: DNA has already been replicated, but has not condensed. Two centrosomes have formed with centriole pairs.
49 The Steps of Mitosis! Prophase: DNA begins to coil and is observable with sister chromatids. Nuclear envelope disappears. Centrosomes move away from each other propelled by lengthening microtubules.
50 The Steps of Mitosis! Metaphase : The longest stage of mitosis. Centrosomes now at complete opposite ends of the cell. Chromosomes held at the middle of the cell by microtobules.
51 The Steps of Mitosis! Anaphase: Shortest stage of mitosis. Sister chromatids are pulled apart to opposite ends of the cell. Pulled apart by microtubules.
52 The Steps of Mitosis! Telophase: Two new daughter nuclei begin to form. Nuclear envelope reappears. The division of one nucleus into two genetically identical nuclei, is now complete!!! Cytokinesis: complete division is underway. Formation of cleavage Furrow.
Class: Date: Honors Biology-CW/HW Cell Biology 2018 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Hooke s discovery of cells was made observing a. living
Unit 3: Cells Objective: To be able to compare and contrast the differences between Prokaryotic and Eukaryotic Cells. The Cell Theory All living things are composed of cells (unicellular or multicellular).
Cell Structure and Function Table of Contents Section 1 The History of Cell Biology Section 2 Introduction to Cells Section 3 Cell Organelles and Features Section 4 Unique Features of Plant Cells Section
Basic Structure of a Cell Prokaryotic Cells No nucleus Archaea & Eubacteria One circular chromosome Extremely small Eukaryotic Cells Has a nucleus!!! Membrane-bound organelles Plants, Animals, Fungi, &
and their organelles Discovery Video: Cells REVIEW!!!! The Cell Theory 1. Every living organism is made of one or more cells. 2. The cell is the basic unit of structure and function. It is the smallest
7 Characteristics of Life 1. Interdependence 2. Metabolism 3. Homeostasis 4. Cellular Structure and Function 5. Reproduction 6. Heredity 7. Evolution The Cell Theory All living things are composed of one
Cell Structure: What cells are made of Can you pick out the cells from this picture? Review of the cell theory Microscope was developed 1610. Anton van Leeuwenhoek saw living things in pond water. 1677
Cell Types Prokaryotes before nucleus no membrane-bound nucleus only organelle present is the ribosome all other reactions occur in the cytoplasm not very efficient Ex.: bacteria 1 Cell Types Eukaryotes
Anaphase Third phase of mitosis in which the chromosomes separate and move to opposite ends of the cell. Animal Cell Antony Van Leevwenhoek 1643- Dutch microscope maker and merchant, observed and described
Intro to Cells Key Concept: Cells are the basic unit of life. Introduction to Cells Cells are the basic units of organisms Cells can only be observed under microscope Basic types of cells: 1 Animal Cell
1 Name: Cell Organelles Tutorial TEK 7.12D: Differentiate between structure and function in plant and animal cell organelles, including cell membrane, cell wall, nucleus, cytoplasm, mitochondrion, chloroplast,
Cell Structure Discovery of the Cell Who discovered cells? 1665 Robert Hooke used a compound microscope to examine a piece of cork (20X magnification) He saw little boxes in the cork and called them cells
Cell Structure and Function Cell size comparison Animal cell Bacterial cell What jobs do cells have to do for an organism to live Gas exchange CO 2 & O 2 Eat (take in & digest food) Make energy ATP Build
1 of 49 Comparing the Cell to a Factory Eukaryotic Cell Structures Structures within a eukaryotic cell that perform important cellular functions are known as organelles. Cell biologists divide the eukaryotic
STATION 1 1. Unlike prokaryotic cells, eukaryotic cells have the capacity to a. assemble into multicellular organisms b. establish symbiotic relationships with other organisms c. obtain energy from the
Topic 3: Cells Ch. 6 -All life is composed of cells and all cells have a plasma membrane, cytoplasm, and DNA. pp.105-107 - The development of the microscope was the key to understanding that all living
T HE C ELL C H A P T E R 1 P G. 4-23 A CELL IS THE SMALLEST LIVING UNIT KNOWN. IT IS OFTEN CALLED THE BUILDING BLOCK OF THE BODY, AND IS THE BASIC STRUCTURAL AND FUNCTIONAL UNIT OF AN ORGANISM. CELL THEORY
Name: Test Date: PAGE: Biology I: Unit 3 Cell Structure Review for Unit Test Directions: You should use this as a guide to help you study for your test. You should also read through your notes, worksheets,
Eukaryotic Cells Eukaryotic cells are more complex than prokaryotic cells. They are identified by the presence of certain membrane-bound organelles. Prokaryotic cells have organelles too, but much fewer
7-1 Life Is Cellular CELL STRUCTURE & FUNCTION Copyright Pearson Prentice Hall The Discovery of the Cell 1665: Robert Hooke used an early compound microscope to look at a thin slice of cork. Cork looked
KEY CONCEPT Eukaryotic cells share many similarities. ! Cells have an internal structure. ! Cells have an internal structure. The cytoskeleton has many functions. ! Cells have an internal structure. The
Cells and Their Organelles The cell is the basic unit of life. The following is a glossary of animal cell terms. All cells are surrounded by a cell membrane. The cell membrane is semipermeable, allowing
Mitosis and Meiosis Cell growth and division The larger the cell, the more trouble the cell has moving nutrients and waste across the cell membrane. 1. DNA/information overload As a cell increases in size,
Chapter 3 Cell Structure and Function Ask yourself If you were a scientist living in the 1500s, what kind of questions would you ask yourself if you were the one to discover cells? Let me think. Cell Video
Teresa Audesirk Gerald Audesirk Bruce E. Byers Biology: Life on Earth Eighth Edition Lecture for Chapter 4 Cell Structure and Function Copyright 2008 Pearson Prentice Hall, Inc. Chapter 4 Outline 4.1 What
chapter 7 Test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Who was one of the first people to identify and see cork cells? a. Anton van
Biology 1 Notebook Review Answers Pages 17 -? The History of Cell Studies 1. Robert Hook (1665) used a microscope to examine a thin slice of cork. The little boxes he observed reminded him of the small
Mr. Ulrich Regents Biology Name:.. Cells and Their Organelles The cell is the basic unit of life. The following is a glossary of animal cell terms. All cells are surrounded by a cell membrane. The cell
UNIT 3 CP BIOLOGY: Cell Structure Page CP: CHAPTER 3, Sections 1-3; HN: CHAPTER 7, Sections 1-2 Standard B-2: The student will demonstrate an understanding of the structure and function of cells and their
Cell Basics Two Basic Cell Types All cells are either prokaryotic or eukaryotic Prokaryotic Cells a.k.a. Bacteria Prokaryotes, which includes all bacteria. They are the simplest cellular organisms. They
Overview of Cells Prokaryotes vs Eukaryotes The Cell Organelles The Endosymbiotic Theory Prokaryotic Cells Archaea Bacteria Come in many different shapes and sizes.5 µm 2 µm, up to 60 µm long Have large
BASIC BIOLOGICAL PRINCIPLES A1 A1. Basic Biological Principles 1. Describe the characteristics of life shared by all prokaryotic and eukaryotic organisms 2. Compare cellular structures and their function
What in the Cell is Going On? Robert Hooke naturalist, philosopher, inventor, architect... (July 18, 1635 - March 3, 1703) In 1665 Robert Hooke publishes his book, Micrographia, which contains his drawings
Name: Date: Hour: 1 2 3 4 5 6 Comprehension Questions 1. At what level of organization does life begin? 2. What surrounds all cells? 3. What is meant by semipermeable? 4. What 2 things make up the cell
Class: Date: Ch 7 Review Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Researchers use fluorescent labels and light microscopy to a. follow
I. History of the cell theory A. Anton van Leeuwenhoek (1600s) - dutch lens maker could see things with his lenses that were invisible to the naked eye - developed the simple microscope B. Robert Hooke
BIO.A.1 Basic Biological Principles Bio.A.1.1 - Explain the characteristics common to all organisms Bio.A.1.2 Describe relationships between the structure & function at biological levels of organization
E X E R C I S E 4 Cell Structure and Cell Cycle Materials model or diagram of a cell compound microscopes and lens paper prepared slides of human skeletal muscle cells, pseudostratified ciliated columnar
Biology Biology 1of 49 2of 49 Eukaryotic Cell Structures Eukaryotic Cell Structures Structures within a eukaryotic cell that perform important cellular functions are known as organelles. Cell biologists
http://koning.ecsu.ctstateu.edu/cell/cell.html 4A: Students will compare and contrast prokaryotic and eukaryotic cells Robert Hooke (1665) Used a compound microscope to look at thin slices of cork (oak
Unit #4: Cell Structure & Func2on Classifica(on, Endosymbiosis, Cell Type, Cell Organelles How are prokaryo(c cells and eukaryo(c cells similar? different? CELL TYPE Cell Theory Many scientists were involved
Introduction to Cells- Stations Lab Station 1: Microscopes allow scientists to study cells. Microscopes: How do light microscopes differ from electron microscopes? (How does each work? How much can each
CELL PART Expanded Definition Cell Structure Illustration Function Summary Location is the material that contains the Carry genetic ALL CELLS information that determines material inherited characteristics.
Cell Organelles a review of structure and function TEKS and Student Expectations (SE s) B.4 Science concepts. The student knows that cells are the basic structures of all living things with specialized
Cell Notes Cell Theory All living organisms are made of. cells The cell is the basic unit of structure and function for all living things, but no one knew they existed before the 17 th century! In 1665,
1 CELL BIOLOGY PROKARYOTIC and EUKARYOTIC SP/1. SP/2. SP/4. Plant and animal cells both have A. ribosomes, cell walls and mitochondria. B. Golgi apparatus, chromosomes and mitochondria. C. Golgi apparatus,
All cells must generate proteins. Cells make protein through a process called protein synthesis All living things are made of cells, Cells are the basic units of structure and function in all organisms,
The Discovery of Cells Microscope observations! General Cell & Organelle Discovery 1600s Observations made by scientists using more powerful microscopes in the 1800s led to the formation of the cell theory.
Honors Biology summer assignment Review the notes and study them. There will be a test on this information the 1 st week of class Biomolecules Molecules that make up living things. There are 4 molecules
Chapter 3 The Cell: Module Hyperlinks 3.1 Cells are the fundamental units of life 3.2 Plant vs. animal cells 3.3 Membranes: structure 3.4 Membranes: function 3.5 The nucleus 3.6 Organelles in protein production
Cell Structure and Function Chapter 4 Chapter 4: Cell Structure Section 1: The History of Cell Biology Section 2: Introduction to Cells Section 3: Cell Organelles and Features Section 4: Unique Features
Now starts the fun stuff Cell structure and function Cell Theory The three statements of the cell theory are: All organisms are composed of one or more cells and the processes of life occur in these cells.
Chapter 7 practice 1. What scientist originally came up with the term "cell"? a. von Leeuwenhoek d. Watson b. Hooke e. Virchow c. van der Waals 2. When you wish to look at the coat of a virus on the surface
CELL PART/ ORGANELLE FUNCTION (what it does) PICTURE Plant, Animal, or Both Cell Membrane controls what goes in & out of the cell protects the cell Nucleus directs all the cell s activities contains cell
STUDY GUIDE SECTION 4-1 The History of Cell Biology Name Period Date Multiple Choice-Write the correct letter in the blank. 1. One early piece of evidence supporting the cell theory was the observation
Cells Modified by the MHJHS SD [Adopted from James Holden & Clint Tucker] The Cell Theory In 1855, a number of scientists put together a theory about cells 1) All living things are composed of Cells. 2)
The Cell Cycle B-2.6: Summarize the characteristics of the cell cycle: interphase (G 1, S, G 2 ); the phases of mitosis (prophase, metaphase, anaphase, telophase); and plant and animal cytokinesis. Key
Objective: The Cell Basic Unit of Life The student will become familiar with the structure and function of the basic cell :) The student will know the differences between and animal cell and a plant cell
the cycle & celldivision the cell cycle Most cells in an organism go through a cycle of growth, development, and division called the cell cycle. The cell cycle makes it possible for organisms to grow and
Science 9 Biology Cell Division and Reproduction Booklet 1 M. Roberts RC Palmer How do all living organisms reproduce and grow? Goal 1: Cell Review Recall and become reacquainted with the structures found
Name Hour Section 7-1 Life Is Cellular (pages 169-173) Introduction (page 169) 1. What is the structure that makes up every living thing? The Discovery of the Cell (pages 169-170) 2. What was Anton van
CELLS NOTES All living things are made of! THE DISCOVERY OF CELLS The Scientist Who? When? What was discovered? Robert Hooke Anton van Leeuwenhoek Looked through a very simple at a thin slice of and saw
The Organization of Cells A. The Cell: The Basic Unit of Life Lecture Series 4 The Organization of Cells B. Prokaryotic Cells C. Eukaryotic Cells D. Organelles that Process Information E. Organelles that
7.L.1.2 Plant and Animal Cells Plant and Animal Cells Clarifying Objective: 7.L.1.2 Compare the structures and functions of plant and animal cells; include major organelles (cell membrane, cell wall, nucleus,
Class IX: Biology Chapter 5: The fundamental unit of life. Key learnings: Chapter Notes 1) In 1665, Robert Hooke first discovered and named the cells. 2) Cell is the structural and functional unit of all
10-2 Cell Division Key Questions: 1)What is the role of chromosomes in cell division? 2) What are the main events of the cell cycle? 3) What events occur during each of the four phases of mitosis? 4) How
Class: Date: Biology Cell Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1, Who. wasone of the first people to-identify and seecorkeells? -,- ; -...
Unit 4: Cells Review Guide LEARNING TARGETS Place a checkmark next to the learning targets you feel confident on. Then go back and focus on the learning targets that are not checked. Identify the parts
Cell Cycle and Mitosis THE CELL CYCLE The cell cycle, or cell-division cycle, is the series of events that take place in a eukaryotic cell between its formation and the moment it replicates itself. These
Or Small Living Things, What Surrounds Them, & How to Keep Them the Same History 1663 Robert Hooke - Using a simple microscope, looked at cork, saw little boxes of cells Thought that they were sacks filled
NAME: PERIOD: DATE: A View of the Cell Use Chapter 8 of your book to complete the chart of eukaryotic cell components. Cell Part Cell Wall Centriole Chloroplast Cilia Cytoplasm Cytoskeleton Endoplasmic
Lesson Overview 10.2 The Process of Cell Division Chromosomes genetic information passed from parent to offspring is carried by chromosomes. Chromosomes enable precise DNA separation during cell division.
Eukaryotic Cell Structure 7.2 Biology Mr. Hines Comparing the cell to a factory In order for a cell to maintain its internal environment (homeostasis), many things must go on. This is similar to a factory.
Chapter 2 Cells and Cell Division Cells The basic functional units of all living things Human cells vary widely but all have similar basic structure Cells vary widely in morphology Neuron Hair cell http://umech.mit.edu/hearing/intro/big/hccomp.000.gif
The Organization of Cells A. The Cell: The Basic Unit of Life Lecture Series 4 The Organization of Cells B. Prokaryotic Cells C. Eukaryotic Cells D. Organelles that Process Information E. Organelles that
How do we define what it means to be alive? Defining Life-7 Characteristics of Life There is no universal definition of life. To define life in unequivocal terms is still a challenge for scientists. Conventional
NAME: PERIOD: The Cell and Its Functions Directions: Using your notes and book as a guide, complete the following questions to review everything we have learned about cells, their parts, and any functions
Cell Structure Chapter 4 Cell Theory Cells were discovered in 1665 by Robert Hooke. Early studies of cells were conducted by - Mathias Schleiden (1838) - Theodor Schwann (1839) Schleiden and Schwann proposed
Cell Review: Day 1 1. "Pseudopodia" literally means? a) False feet b) True motion c) False motion d) True feet Cell Review: Day 1 2. What is the primary method of movement for Euglena? a) Flagella b) Cilia
Chapter 7.2 Cell Structure Daily Objectives Describe the structure and function of the cell nucleus. Describe the function and structure of membrane bound organelles found within the cell. Describe the
Cells Cytology = the study of cells What Are the Main Characteristics of organisms? 1. Made of CELLS 2. Require ENERGY (food) 3. REPRODUCE (species) 4. Maintain HOMEOSTASIS 5. ORGANIZED 6. RESPOND to environment
section 3.2 Eukaryotic Cells and Cell Organelles Teacher Notes and Answers SECTION 2 Instant Replay 1. Answers will vary. An example answer is a shapeless bag. 2. store and protect the DNA 3. mitochondria
Analyze the functional inter-relationship of cell structures Learning Outcome B1 Describe the following cell structures and their functions: Cell membrane Cell wall Chloroplast Cytoskeleton Cytoplasm Golgi
The Cell Cycle Chapter 12 Why are cells small? As cells get bigger they don t work as well WHY? Difficulties Larger Cells Have: More demands on its DNA Less efficient in moving nutrients/waste across its
The Cell The basic unit of all living things 1 Robert Hooke was the first to name the cell (1665) 2 The Cell Theory The cell is the unit of Structure of all living things. The cell is the unit of Function
History of Cell Theory Robert Hooke first observed cells while examining cork under the microscope (mid- 1600 s) Anton van Leeuwenhoek first observed microscopic organisms in pond water, as well as blood
Name: Date: 1. Which structure is outside the nucleus of a cell and contains DNA? A. chromosome B. gene C. mitochondrion D. vacuole 2. A potato core was placed in a beaker of water as shown in the figure