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CHAPTER
NEW CHAPTER
Single-Celled Organisms
and Viruses
the BIG idea
Bacteria and protists have the characteristics of living things, while
viruses are not alive.
1.1
Single-celled organisms have all the characteristics of living
things.
1.2
Bacteria are single-celled organisms without nuclei.
1.3
Viruses are not alive but affect other living things.
1.4
Protists are a diverse group of organisms.
CHAPTER OUTLINE
CHAPTER RESOURCES
1.1
KEY CONCEPT
CHAPTER HOME
Single-celled organisms have all the
characteristics of living things.
Scientists divide organisms into six kingdoms. All living
things, including microorganisms, are organized, grow,
reproduce, and respond to the environment.
VOCABULARY
microorganism
kingdom
binary fission
virus
CHAPTER
RESOURCES
Plants
SECTION
OUTLINE
1.1
CHAPTER HOME
KEY CONCEPT
Single-celled organisms have all the
characteristics of living things.
Scientists divide organisms into six kingdoms. All living
things, including microorganisms, are organized, grow,
reproduce, and respond to the environment.
VOCABULARY
microorganism
kingdom
binary fission
virus
CHAPTER
RESOURCES
Animals
SECTION
OUTLINE
1.1
CHAPTER HOME
KEY CONCEPT
Single-celled organisms have all the
characteristics of living things.
Scientists divide organisms into six kingdoms. All living
things, including microorganisms, are organized, grow,
reproduce, and respond to the environment.
VOCABULARY
microorganism
kingdom
binary fission
virus
CHAPTER
RESOURCES
Protists
SECTION
OUTLINE
1.1
CHAPTER HOME
KEY CONCEPT
Single-celled organisms have all the
characteristics of living things.
Scientists divide organisms into six kingdoms. All living
things, including microorganisms, are organized, grow,
reproduce, and respond to the environment.
VOCABULARY
microorganism
kingdom
binary fission
virus
CHAPTER
RESOURCES
Fungi
SECTION
OUTLINE
1.1
KEY CONCEPT
CHAPTER HOME
Single-celled organisms have all the
characteristics of living things.
Scientists divide organisms into six kingdoms. All living
things, including microorganisms, are organized, grow,
reproduce, and respond to the environment.
VOCABULARY
microorganism
kingdom
binary fission
virus
CHAPTER
RESOURCES
Bacteria
SECTION
OUTLINE
1.1
KEY CONCEPT
CHAPTER HOME
Single-celled organisms have all the
characteristics of living things.
Scientists divide organisms into six kingdoms. All living
things, including microorganisms, are organized, grow,
reproduce, and respond to the environment.
VOCABULARY
microorganism
kingdom
binary fission
virus
CHAPTER
RESOURCES
Archaea
SECTION
OUTLINE
1.2
CHAPTER HOME
KEY CONCEPT
Bacteria are single-celled organisms without
nuclei.
• Bacteria and archaea are the smallest living things.
VOCABULARY
• Archaea and bacteria are found in many environments.
bacteria
• Bacteria may help or harm other organisms.
archaea
producer
decomposer
parasite
CHAPTER
RESOURCES
Archaea
Bacteria
SECTION
OUTLINE
1.2
KEY CONCEPT
CHAPTER HOME
Bacteria are single-celled organisms without
nuclei.
• Bacteria and archaea are the smallest living things.
VOCABULARY
• Archaea and bacteria are found in many environments.
bacteria
• Bacteria may help or harm other organisms.
archaea
producer
decomposer
parasite
VISUALIZATION
Observe the process of
binary fission.
CHAPTER
RESOURCES
SECTION
OUTLINE
1.3
CHAPTER HOME
KEY CONCEPT
Viruses are not alive but affect other living things.
A virus consists of genetic material enclosed in a
protein coat.
Genetic
Material
Capsid
VOCABULARY
host cell
CHAPTER
RESOURCES
SECTION
OUTLINE
1.3
CHAPTER HOME
KEY CONCEPT
Viruses are not alive but affect other living things.
A virus consists of genetic material enclosed in a
protein coat. Viruses can not reproduce on their own,
but they use materials within living cells to make copies
of themselves.
empty virus
copies of viral DNA
new virus parts
VOCABULARY
host cell
bacterial
DNA
pieces
CHAPTER
RESOURCES
SECTION
OUTLINE
1.3
KEY CONCEPT
CHAPTER HOME
Viruses are not alive but affect other living things.
A virus consists of genetic material enclosed in a
protein coat. Viruses can not reproduce on their own,
but they use materials within living cells to make copies
of themselves.
VOCABULARY
host cell
VISUALIZATION
CLASSZONE.COM
See how viruses infect and
multiply within bacteria.
CHAPTER
RESOURCES
SECTION
OUTLINE
1.4
CHAPTER HOME
KEY CONCEPT
Protists are a diverse group of organisms.
VOCABULARY
algae
plankton
protozoa
Plantlike algae get energy
from sunlight.
CHAPTER
RESOURCES
SECTION
OUTLINE
1.4
CHAPTER HOME
KEY CONCEPT
Protists are a diverse group of organisms.
VOCABULARY
algae
plankton
protozoa
Funguslike protists are
decomposers.
CHAPTER
RESOURCES
SECTION
OUTLINE
1.4
CHAPTER HOME
KEY CONCEPT
Protists are a diverse group of organisms.
VOCABULARY
algae
plankton
protozoa
Protozoa, animal-like protists,
eat other organisms.
CHAPTER
RESOURCES
SECTION
OUTLINE
1.1
KEY CONCEPT
CHAPTER HOME
Single-celled organisms have all the
characteristics of living things.
I. Single-celled organisms have all the characteristics
of living things.
A. Living things come in many shapes and sizes.
B. Living things share common characteristics.
1. Organization
VOCABULARY
microorganism
kingdom
binary fission
virus
2. Growth
3. Reproduction
4. Response
C. Living things need energy, materials, and living
space.
D. Viruses are not alive.
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
1.2
KEY CONCEPT
CHAPTER HOME
Bacteria are single-celled organisms without
nuclei.
II. Bacteria are single-celled organisms without nuclei.
A. Bacteria and archaea are the smallest living
things.
B. Archaea and bacteria are found in many
environments.
1. Archaea
VOCABULARY
bacteria
archaea
producer
decomposer
parasite
2. Bacteria
C. Bacteria may help or harm other organisms.
1. Helpful Bacteria
2. Harmful Bacteria
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
1.3
KEY CONCEPT
CHAPTER HOME
Viruses are not alive but affect other living things.
III. Viruses are not alive but affect other living things.
VOCABULARY
host cell
A. Viruses share some characteristics with living
things.
B. Viruses multiply inside living cells.
C. Viruses may harm host cells.
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
1.4
CHAPTER HOME
KEY CONCEPT
Protists are a diverse group of organisms.
IV. Protists are a diverse group of organisms.
VOCABULARY
algae
A. Most protists are single-celled.
plankton
B. Protists obtain their energy in three ways.
1. Algae
protozoa
2. Protozoa
3. Other Protists
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
CHAPTER HOME
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