Document 1501773

Lesson 2
Levels of Organization
Predict three facts that will be discussed in Lesson 2 after reading the headings. Write your
predictions in your Science Journal.
Summarize life’s organization.
Life’s Organization
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.
Unicellular Organisms
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All organisms
.
Organize information about unicellular organisms by completing
.
the graphic organizer.
Unicellular Organisms
Description:
• cell without a membrane-
Description:
• cell has a
surrounded by a
bound
• smaller than
;
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
some live in
• many specialized
• obtain
• respond
• grow
•
From a Cell to an Organism
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Lesson 2 | Levels of Organization (continued)
Multicellular Organisms
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Compare and contrast unicellular and multicellular
.
organisms.
Unicellular
Multicellular
• made up of
• made up of
• processes needed for
survival are carried out
within
Both
carry out
all life
processes
• each type of cell has a
that is important to the
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.
Organize information about cell differentiation.
Cell Differentiation
Definition:
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From a Cell to an Organism
In animals (stem cells)
located:
in embryos:
what it does:
in adults:
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
In plants (meristems)
Lesson 2 | Levels of Organization (continued)
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.
.
Identify the 4 main types of animal tissue.
1.
3.
2.
4.
Identify 3 main types of plant tissue, and tell the function of each.
Plant Tissue
Type
Function
1. Dermal
2.
3. Ground
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.
Sequence the organization of cells, tissues, organs, and organ
systems in a multicellular organism.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Cells are organized in
.
Different
working together to perform
a particular job are called
Groups of
.
that work together to complete
a series of tasks are called
Many
make up an
.
working together
.
The cells of all your organs have the same DNA in their nuclei, yet all
perform different jobs in your body. Explain how this can be so. Use the term cellular
differentiation in your explanation.
From a Cell to an Organism
31
Review
From a Cell to an Organism
Chapter Wrap-Up
Now that you have read the chapter, think about what you have learned.
Use this checklist to help you study.
Complete your Foldables® Chapter Project.
Study your Science Notebook on this chapter.
Study the definitions of vocabulary words.
Reread the chapter, and review the charts, graphs, and illustrations.
Review the Understanding Key Concepts at the end of each lesson.
Look over the Chapter Review at the end of the chapter.
Reread the chapter Big Idea and the lesson Key Concepts. Draw
the 4 phases of mitosis, and label your drawing. Tell how mitosis is important for
both unicellular and multicellular organisms.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Challenge Unicellular organisms are sometimes called “simple” organisms. Imagine that you are
involved in a debate and must argue against this description. What would you say?
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From a Cell to an Organism