Download Why is cell division important? The Cell Cycle Mitosis

Name
Date
Section 1 Cell Division and Mitosis
Why is cell
division
important?
I found this information
on page
.
The Cell Cycle
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on page
.
(continued)
Identify the 3 reasons cell division is important.
1. growth
2. replacement
3. reproduction
Summarize information about interphase in eukaryotic cells in
the following paragraph.
Interphase is the
interphase, cells
longest
grow
part of the cell cycle. During
and
develop
phase, cells that are still dividing copy their
prepare for
cell division
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
I found this information
on page
.
DNA
and
. Cells no longer dividing are
always in interphase
Mitosis
. During inter-
.
Sequence the steps of mitosis, and write a short description of
what takes place in each phase.
1. Interphase—Cell prepares for mitosis; chromosomes
duplicate.
Have students work
in pairs to identify
the details of the
sequence in mitosis.
2. Prophase—Chromatid pairs are visible; spindle is beginning
to form.
3. Metaphase—Chromatid pairs line up at the center of the cell.
4. Anaphase—Chromatids separate and start moving to
opposite ends of the cell.
5. Telophase—Spindle fibers start to disappear and the
chromosomes start to uncoil.
6. Division of the cytoplasm—Two new cells are formed.
Cell Reproduction
41
Name
Date
Section 1 Cell Division and Mitosis
I found this information
on page
.
(continued)
Compare mitosis in animals and plants. State if each feature exists
in plant cells, animal cells, or both.
Feature
Cell Type
Centrioles
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on page
.
animal
Spindle fibers
both
Cell plate
plant
Cell wall
plant
Organize important concepts about mitosis.
1. Mitosis is the division of a
cell nucleus
.
2. Mitosis produces two new nuclei that are identical both to
each other
and to
the original nucleus
.
produce
Asexual
Reproduction
I found this information
on page
.
two
nuclei, each with
46
chromosomes.
Identify the 3 forms of asexual reproduction described below.
fission
budding
regeneration
the method by which bacteria reproduce
new organism growing from body of the parent
to regrow body parts that are lost or damaged
CONNECT IT
A strawberry farmer wants to increase her crop without spending
large amounts of money for new seeds. How can she take advantage of asexual
reproduction to increase her crop? Accept all reasonable responses.
Strawberry plants can reproduce asexually. They grow horizontal stems called runners,
which can produce new plants. The farmer could take advantage of these runners. She
could let them grow and produce new plants.
42
Cell Reproduction
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
3. A nucleus with 46 chromosomes that undergoes mitosis will