Download Cell Division

Cell Division
Organisms grow,
reproduce, and
maintain themselves
through cell division.
Key Concepts
SECTION
1
Cell division occurs
in all organisms.
Learn about the functions
of cell division.
SECTION
2
Cell division is part
of the cell cycle.
Learn about the cell cycle
and the process of mitosis.
SECTION
3
Both sexual and
asexual reproduction
involve cell division.
Learn how sexual reproduction compares with asexual
reproduction.
Prepare and practice for
the FCAT
• Section Reviews, pp. 488,
495, 502
• Chapter Review, pp. 504–506
• FCAT Practice, p. 507
CLASSZONE.COM
• Florida Review: Content
Review and FCAT Practice
480 Unit 4: Heredity and Human Development
Some of these bacterial cells
are dividing. How are the cells
formed in cell division like the
other cells in the photograph?
Dividing to Multiply
Carefully observe a maple tree samara like
the ones shown here. Notice the different
parts of a samara. Break a samara into two
pieces. Peel back the end of each half,
where you broke it.
Observe and Think
What did you find when
you peeled back the
ends? How does
something as small as a
seed produce something
as large as a tree?
Division Math
Take a piece of clay and divide it in half.
Now you have two pieces of clay,
each half the size of the original
piece. Divide each of the two
new pieces in half, producing
4 pieces, each a quarter the size
of the original piece.
Observe and Think What
will happen if you keep
dividing the pieces in half?
How might the division of the
cells in living things be different?
Internet Activity:
Cell Division
Go to ClassZone.com
to match images of
cells dividing with the
different stages of
cell division.
Observe and Think Are
the stages the same for
plant and animal cells?
NSTA
scilinks.org
Cellular Mitosis Code: MDL033
Chapter 14: Cell Division 481
CHAPTER 14
CONCEPT REVIEW
VOCABULARY REVIEW
• The cell is the basic unit of
structure and function in
living things.
See Glossary for definitions
• All cells come from other cells.
• Some cells are prokaryotic
and some are eukaryotic.
cell membrane
cycle
eukaryotic cell
nucleus
prokaryotic cell
FLORIDA REVIEW
CLASSZONE.COM
Content Review and FCAT Practice
TAKING NOTES
COMBINATION NOTES
To take notes about a new
concept, first make an
informal outline of the
information. Then make a
sketch of the concept and
label it so you can study it
later.
VOCABULARY
STRATEGY
Write each new vocabulary
term in the center of a
frame game diagram.
Decide what information
to frame it with. Use
examples, description,
parts, sentences that use
the term in context, or pictures. You can change the
frame to fit each term.
482
NOTES
Mitosis has four phases
• prophase:
chromosomes
become visible
• metaphase:
chromosomes line
up in middle
forms chromosomes when
cell is ready to divide
found in
nucleus of
eukaryotic
cells
DNA
loose threadlike
strands of DNA
is copied
during
interphase