Cell Division

CHAPTER

the BIG ideathe BIG idea

CHAPTER OUTLINE

Organisms grow, reproduce, and maintain themselves through cell division.

Cell division occurs in all organisms.3.13.1

Cell division is part of the cell cycle.3.23.2

Both sexual and asexual reproduction involve cell division.3.33.3

NEW CHAPTER

CHAPTER RESOURCES

VOCABULARY

KEY CONCEPT CHAPTER HOME

3.13.1

SECTION OUTLINESECTION OUTLINE

Cell division occurs in all organisms.

chromosome

DNA

CHAPTERRESOURCESCHAPTERRESOURCES

CALIFORNIAContent Standards

7.1.c Students know the nucleus is the repository for genetic information in plant and animal cells.

7.2.e Students know DNA (deoxyribonucleic acid) is the genetic material of living organisms and is located

in the chromosomes of each cell.

VOCABULARY

KEY CONCEPT CHAPTER HOME

3.13.1

SECTION OUTLINESECTION OUTLINE

Cell division occurs in all organisms.

• In unicellular organisms the function of cell division is reproduction. One cell splits into two!

• In multicellular organisms functions of cell division include growth, development, and repair.

break in skin

dividing cells

new cells pushed up to fill cut

new cell layers

wound is healed

cells stop dividing

chromosome

DNA

CHAPTERRESOURCESCHAPTERRESOURCES

VOCABULARY

KEY CONCEPT CHAPTER HOME

I. Cell division occurs in all organisms.

A. Cell division is involved in many functions.

B. The genetic material of eukaryotic cells is organized in chromosomes.

2. Chromosomes

3.13.1

KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY

1. DNA

Cell division occurs in all organisms.

C. Cell division is involved in growth, development, and repair.

2. Development

1. Growth

chromosome

DNA

3. RepairCHAPTERRESOURCESCHAPTERRESOURCES

VOCABULARY

KEY CONCEPT CHAPTER HOME

Cell division is part of the cell cycle.3.23.2

SECTIONOUTLINESECTIONOUTLINE

interphase

mitosis

cell cycle

cytokinesis

CHAPTERRESOURCESCHAPTERRESOURCES

CALIFORNIAContent Standards

7.1.c Students know the nucleus is the repository for genetic information in plant and animal cells.

7.1.e Students know cells divide to increase their numbers through a process of mitosis, which results in two daughter cells with identical sets of chromosomes.

VOCABULARY

KEY CONCEPT CHAPTER HOME

Cell division is part of the cell cycle.3.23.2

SECTIONOUTLINESECTIONOUTLINE

interphase

mitosis

cell cycle

cytokinesis

The cell cycle has two main phases, interphase and mitosis. Most of the life cycle of a cell is spent in interphase. During mitosis, the nucleus divides.

cell grows and carries out normal activities; organelles duplicate

DNA replicates

cell grows and prepares

for mitosis

CHAPTERRESOURCESCHAPTERRESOURCES

VOCABULARY

KEY CONCEPT CHAPTER HOME

II. Cell division is part of the cell cycle.

A. The cell cycle includes interphase and cell division.

B. Cell division produces two genetically identical cells.

3.23.2

KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY

1. Interphase

2. Cell Division Phase

Cell division is part of the cell cycle.

1. Steps of Mitosis

2. Division of the Cytoplasm

interphase

mitosis

cell cycle

cytokinesis

CHAPTERRESOURCESCHAPTERRESOURCES

VOCABULARY

KEY CONCEPT CHAPTER HOME

Cell division is part of the cell cycle.3.23.2

SECTIONOUTLINESECTIONOUTLINE

interphase

mitosis

cell cycle

cytokinesis

The cell cycle has two main phases, interphase and mitosis. Most of the life cycle of a cell is spent in interphase. During mitosis, cells divide.

VISUALIZATION

Watch the process of mitosis in action.

CLASSZONE.COM

VISUALIZATION

Match images of cells dividing with the different stages of cell division.

CHAPTERRESOURCESCHAPTERRESOURCES

VOCABULARY

KEY CONCEPT CHAPTER HOME

3.33.3

SECTIONOUTLINESECTIONOUTLINE

Both sexual and asexual reproduction involve cell division.

binary fission

asexual reproduction

regeneration

CHAPTERRESOURCESCHAPTERRESOURCES

CALIFORNIAContent Standards

7.2.a Students know the differences between the life cycles and reproduction methods of sexual and asexual organisms.

VOCABULARY

KEY CONCEPT CHAPTER HOME

Asexual and Sexual Reproduction

3.33.3

SECTIONOUTLINESECTIONOUTLINE

Both sexual and asexual reproduction involve cell division.

binary fission

asexual reproduction

regeneration

Some organisms reproduce asexually. Both asexual and sexual reproduction involve cell division.

CHAPTERRESOURCESCHAPTERRESOURCES

Asexual Reproduction Sexual Reproduction

One parent organism Two parent organisms

Offspring’s genes are identical to parent’s genes

Offspring’s genes are combined from two parents

Can reproduce quickly Usually reproduce more slowly

VOCABULARY

KEY CONCEPT CHAPTER HOME

III. Both sexual and asexual reproduction involve cell division.

A. Asexual reproduction involves one parent.

B. Sexual reproduction involves two parent organisms.

1. Cell Division in Unicellular Organisms

2. Budding

3.33.3

KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY

Both sexual and asexual reproduction involve cell division.

binary fission

asexual reproduction

regeneration

3. Regeneration

4. Asexual Reproduction and Health

CHAPTERRESOURCESCHAPTERRESOURCES

CHAPTER HOME

Image GalleryImage Gallery

Click on the icons to see a larger image or animation.

VISUALIZATION

Watch the process of mitosis in action.

CLASSZONE.COM

VISUALIZATION

Match images of cells dividing with the different stages of cell division.

Chapter ResourcesChapter ResourcesCHAPTER HOME

BACK TO CHAPTER

Content Review Review key concepts and vocabulary

Math Tutorial Review math concepts

Resource Center Get more information on select science topics

Standardized Test Practice Practice state standardized tests

Animations Link to all the McDougalLittell Science animations

Review Game Play a fun interactivereview game

Audio Readings Hear chapter audio readings

Image GalleryClick here to review chapter images and animations

Click on the items below to access resources on CLASSZONE.COM