1. Chapter 3 Objectives List three advantages of being multicellular.
Section 3 The Organization of Living Things
Chapter 3
Objectives
List three advantages of being multicellular.
Describe four levels of organization in living things.
Explain the relationship between the structure and
function of a part of an organism.

2. Section 3 The Organization of Living Things
Chapter 3
Bellringer
Why can’t you use your teeth to breathe? Why can’t you use your arm muscles to digest food?
Write your answers in your science notebook.

3. Section 3 The Organization of Living Things
Chapter 3

4. The Benefits of Being Multicellular
Section 3 The Organization of Living Things
Chapter 3
The Benefits of Being Multicellular
Larger Size
Larger organisms are prey for fewer predators.
Larger predators can eat a wider variety of prey.

5. The Benefits of Being Multicellular
Section 3 The Organization of Living Things
Chapter 3
The Benefits of Being Multicellular
Longer Life The life span
of a multicellular organism
is not limited to the life
span of a single cell.
Specialization Each type
of cell has a particular job.
Specialization makes the
organism more efficient.

6. larger size longer life cell specialization Chapter 3
Section 3 The Organization of Living Things
Chapter 3
Reading Check: What are three advantages of being multicellular?
larger size
longer life
cell specialization

7. Cells Working Together
Section 3 The Organization of Living Things
Chapter 3
Cells Working Together
A tissue is a group of cells that
work together to perform a
specific job.
Animals have four basic types
of tissues: nerve tissues,
muscle tissue, connective
tissue, and protective tissue.
Plants have three types of
tissues: transport tissue,
protective tissue, and ground
tissue (photosynthesis).

8. Tissues Working Together
Section 3 The Organization of Living Things
Chapter 3
Tissues Working Together
A structure made up of two or more tissues working
together to perform a specific function is called an
organ.
The heart, stomach,
intestines, brain,
and lungs are
examples of organs
in humans.
Leaves, stems, and roots
are examples of plant
organs.

9. Reading Check: What is an organ?
Chapter 3
Section 2 Eukaryotic Cells
Reading Check: What is an organ?
An organ is a structure of two or more
tissues working together to perform a
specific function in the body.

10. Tissues Working Together, continued
Section 3 The Organization of Living Things
Chapter 3
Tissues Working Together, continued
A group of two or more organs working together to
perform a particular function is called an organ
system. Each organ system has a specific job in the
body.
Examples of organ systems are the digestive
system, the respiratory system, and the
cardiovascular system.
Examples of plant organ systems are leaf systems,
root systems, and stem systems.

11. Section 3 The Organization of Living Things
Chapter 3

12. Chapter 3 Overview of Organ Systems
Section 3 The Organization of Living Things
Chapter 3
Overview of Organ Systems
Click below to watch the Visual Concept.
You may stop the video at any time by pressing the Esc key.
Visual Concept

13. Section 3 The Organization of Living Things
Chapter 3
Organisms
Anything that can perform life processes by itself is
an organism.
An organism made of a single cell is a unicellular
organism. A unicellular organism must carry out all
life processes in order for that cell to survive.
In contrast, multicellular organisms have specialized
cells that depend on each other for the organism to
survive.

14. Structure and Function
Section 3 The Organization of Living Things
Chapter 3
Structure and Function
In organisms, structure and function are related.
Structure is the arrangement of parts in an organism.
Function is the job that the part does.

15. Structure and Function, continued
Section 3 The Organization of Living Things
Chapter 3
Structure and Function, continued
The structures of alveoli and blood vessels enable them to perform a function. Together, they bring oxygen into the body and get rid of its carbon dioxide.

16. Chapter 3 Quick Check Quiz!!!
Section 3 The Organization of Living Things
Chapter 3
Quick Check Quiz!!!
1. What is the relationship between your digestive system,
stomach, and intestines?
The digestive system is an organ system. The stomach and
intestines are organs that are parts of the digestive system.
2. What is the main difference between a unicellular
organism and a multicellular organism in the way life processes are carried out?
Sample answer: A unicellular organism must perform all life
functions by itself. A multicellular organism may have
specialized cells that work together to carry out each
function.

17. Chapter 3 Section 3.3 Review
Cells: The Basic Units of Life
Section 3.3 Review
Advantages of being multicellular are larger size,
longer life, and cell specialization.
Four levels of organization are cell, tissue, organ,
and organ system.
A tissue is a group of cells working together. An
organ is two or more tissues working together. An
organ system is two or more organs working
together.
In organisms, a part’s structure and function are
related.

18. Chapter 3
Cells: The Basic Units of Life
Concept Map
Use the terms below to complete the concept map on the next slide.
prokaryotes
cells do
do not
plants
eubacteria
humans
bacteria
eukaryotes

19. Chapter 3
Cells: The Basic Units of Life

20. Chapter 3
Cells: The Basic Units of Life

21. Interpreting Graphics
Chapter 3
Standardized Test Preparation
Interpreting Graphics
The diagrams below show two kinds of cells. Use these cell diagrams to answer the questions that follow.

22. Chapter 3 1. What is the name of the organelle labeled A in Cell 1?
Standardized Test Preparation
1. What is the name of the organelle labeled A in Cell 1?
A endoplasmic reticulum
B mitochondrion
C vacuole
D nucleus

23. Chapter 3 1. What is the name of the organelle labeled A in Cell 1?
Standardized Test Preparation
1. What is the name of the organelle labeled A in Cell 1?
A endoplasmic reticulum
B mitochondrion
C vacuole
D nucleus

24. Chapter 3 2. What type of cell is Cell 1? F a bacterial cell
Standardized Test Preparation
2. What type of cell is Cell 1?
F a bacterial cell
G a plant cell
H an animal cell
I a prokaryotic cell

25. Chapter 3 2. What type of cell is Cell 1? F a bacterial cell
Standardized Test Preparation
2. What type of cell is Cell 1?
F a bacterial cell
G a plant cell
H an animal cell
I a prokaryotic cell

26. Chapter 3
Standardized Test Preparation
3. What is the name and function of the organelle labeled B in Cell 2?
A The organelle is a vacuole, and it stores water and other materials.
B The organelle is the nucleus, and it contains the DNA.
C The organelle is the cell wall, and it gives shape to the cell.
D The organelle is a ribosome, where proteins are put together.

27. Chapter 3
Standardized Test Preparation
3. What is the name and function of the organelle labeled B in Cell 2?
A The organelle is a vacuole, and it stores water and other materials.
B The organelle is the nucleus, and it contains the DNA.
C The organelle is the cell wall, and it gives shape to the cell.
D The organelle is a ribosome, where proteins are put together.

28. Chapter 3 4. What type of cell is Cell 2? How do you know?
Standardized Test Preparation
4. What type of cell is Cell 2? How do you know?
F prokaryotic; because it does not have a nucleus
G eukaryotic; because it does not have a nucleus
H prokaryotic; because it has a nucleus
I eukaryotic; because it has a nucleus

29. Chapter 3 4. What type of cell is Cell 2? How do you know?
Standardized Test Preparation
4. What type of cell is Cell 2? How do you know?
F prokaryotic; because it does not have a nucleus
G eukaryotic; because it does not have a nucleus
H prokaryotic; because it has a nucleus
I eukaryotic; because it has a nucleus

30. Chapter 3 Math Read each question, and choose the best answer.
Standardized Test Preparation
Math
Read each question, and choose the best answer.

31. Chapter 3
Standardized Test Preparation
1. What is the surface area–to-volume ratio of the rectangular solid shown in the diagram below?
A 0.5:1
B 2:1
C 36:1
D 72:1

32. Chapter 3
Standardized Test Preparation
1. What is the surface area–to-volume ratio of the rectangular solid shown in the diagram below?
A 0.5:1
B 2:1
C 36:1
D 72:1

33. Chapter 3
Standardized Test Preparation
2. Look at the diagram of the cell below. Three molecules of food per cubic unit of volume per minute are required for the cell to survive. One molecule of food can enter through each square unit of surface area per minute. What will happen to this cell?
F The cell is too small, and it will starve.
G The cell is too large, and it will starve.
H The cell is at a size that will allow it to survive.
I There is not enough information to determine the answer.

34. Chapter 3
Standardized Test Preparation
2. Look at the diagram of the cell below. Three molecules of food per cubic unit of volume per minute are required for the cell to survive. One molecule of food can enter through each square unit of surface area per minute. What will happen to this cell?
F The cell is too small, and it will starve.
G The cell is too large, and it will starve.
H The cell is at a size that will allow it to survive.
I There is not enough information to determine the answer.

35. Chapter 3
Section 1 The Diversity of Cells

36. Chapter 3
Section 2 Eukaryotic Cells

37. Chapter 3
Section 2 Eukaryotic Cells

38. Chapter 3
Section 2 Eukaryotic Cells

39. Chapter 3
Section 2 Eukaryotic Cells

40. Chapter 3
Section 2 Eukaryotic Cells

41. Chapter 3
Section 2 Eukaryotic Cells

42. Section 3 The Organization of Living Things
Chapter 3

43. Chapter 3
Standardized Test Preparation

44. Chapter 3
Standardized Test Preparation

45. Chapter 3
Standardized Test Preparation

46. Chapter 3
Standardized Test Preparation

47. Chapter 3
Section 1 The Diversity of Cells