Click on one of the following icons to go to that resource. Chapter Resources Click on one of the following icons to go to that resource. glencoe.com Image Bank Foldables Video Clips and Animations Chapter Summary Chapter Review Questions Standardized Test Practice

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Image Bank Transfer Images To transfer images to your own power point follow the following steps: Open the “Resource” file from the CD-ROM disc – view the file in the “normal view” or “slide sorter view” mode - go to slide #2 – from there you can click through the images and follow these instructions. Click once on the image. Copy the image Go to your own power point document Paste the image.

Image Bank Paramecium

Image Bank Cell Cycle

Image Bank Interphase

Image Bank Cell Division

Image Bank DNA

Image Bank Cell Division

Image Bank Prophase

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Image Bank Mitosis Ends

Image Bank Chromosomes

Image Bank Female Cat

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Image Bank Starfish Regrowth

Image Bank Sperm and Egg

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Image Bank Meiosis I and II

Image Bank Meiosis I

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How and Why Cells Divide Foldables How and Why Cells Divide Make the following Foldable to help you organize information from the chapter about cell reproduction.

Foldables Draw a mark at the midpoint of a vertical sheet of paper along the side edge.

Foldables Turn the paper horizontally and fold the outside edges in to touch at the midpoint mark.

Use a pencil to draw a cell on the front of your Foldable as shown. Foldables Use a pencil to draw a cell on the front of your Foldable as shown.

Foldables Analyze As you read the chapter, write under the flaps how cells divide. In the middle section, list why cells divide.

Video Clips Click box to view movie.

Video Clips Click box to view movie.

Video Clips Click image to view movie.

Cell Division and Mitosis Reviewing Main Ideas 1 Cell Division and Mitosis The life cycle of a cell has two parts—growth and development, and cell division. In mitosis, the nucleus divides to form two identical nuclei. Mitosis occurs in four continuous steps, or phases—prophase, metaphase, anaphase, and telophase.

Cell Division and Mitosis Reviewing Main Ideas 1 Cell Division and Mitosis Cell division in animal cells and plant cells is similar, but plant cells do not have centrioles and animal cells do not form cell walls. Organisms use cell division to grow, to replace cells, and for asexual reproduction. Asexual reproduction produces organisms with DNA identical to the parent’s DNA. Fission, budding, and regeneration can be used for asexual reproduction.

Sexual Reproduction and Meiosis Reviewing Main Ideas 2 Sexual Reproduction and Meiosis Sexual reproduction results when an egg and sperm join. This event is called fertilization, and the cell that forms is called the zygote. Meiosis occurs in the reproductive organs, producing four haploid sex cells. During meiosis, two divisions of the nucleus occur. Meiosis ensures that offspring produced by fertilization have the same number of chromosomes as their parents.

Reviewing Main Ideas 3 DNA DNA is a large molecule made up of two twisted strands of sugar-phosphate molecules and nitrogen bases. All cells contain DNA. The section of DNA on a chromosome that directs the making of a specific protein is a gene.

Reviewing Main Ideas 3 DNA DNA can copy itself and is the pattern from which RNA is made. Messenger RNA, ribosomal RNA, and transfer RNA are used to make proteins. Permanent changes in DNA are called mutations.

Question 1 Which is NOT a phase of mitosis? A. anaphase B. interphase Chapter Review Question 1 Which is NOT a phase of mitosis? A. anaphase B. interphase C. intraphase D. metaphase LE 4.4

Chapter Review Answer The answer is C. There is no phase of mitosis called intraphase.

Chapter Review Question 2 A hydra that reproduces by budding is an example of _______? A. asexual reproduction B. mitosis C. regeneration D. sexual reproduction LE 4.1

Chapter Review Answer The answer is A. Asexual reproduction results in offspring that are an exact copy of the adult.

Chapter Review Question 3 What type of nitrogen is found in RNA, but not in DNA. Answer The answer is uracil. RNA has the base uracil instead of thymine. LE 2.1a

Chapter Review Question 4 When cells have pairs of similar chromosomes, they are said to be _______. Answer The answer is diploid. A typical human body cell is diploid. LE 4.4b

Question 5 This illustration represents what division of the nucleus? Chapter Review Question 5 This illustration represents what division of the nucleus? LE 4.4

Chapter Review Answer The answer is meiosis 1. The end result of meiosis 1 is a pair of new cells, each with one duplicated chromosome from each parent.

Standardized Test Practice Question 1 Which letter corresponds with the step of mitosis where each centromere divides, the spindle fibers shorten, each pair of chromatids separates, and chromatids begin to move to opposite ends of the cell? LE 4.4

Standardized Test Practice A. A B. B C. C D. D LE 4.4

Answer The answer is C. Anaphase is the third step of mitosis. Standardized Test Practice Answer The answer is C. Anaphase is the third step of mitosis.

Question 2 Which letter corresponds with telophase? A. A B. B C. C Standardized Test Practice Question 2 Which letter corresponds with telophase? A. A B. B C. C D. D LE 4.4

Standardized Test Practice Answer The answer is D. During telophase, spindle fibers start to disappear, the chromosomes start to uncoil, and a new nucleus forms.

Question 3 Which is the number of chromosomes in a body cell? A. 23 Standardized Test Practice Question 3 Which is the number of chromosomes in a body cell? A. 23 B. 36 C. 42 D. 46 LE 4.4b

Standardized Test Practice Answer The answer is D. Each human body cell has 23 pairs of chromosomes, 46 chromosomes all together.

Question 4 Sea stars can grow new arms. What is this an example of? Standardized Test Practice Question 4 Sea stars can grow new arms. What is this an example of? A. asexual reproduction B. budding C. regeneration D. sexual reproduction LE 4.1b

Standardized Test Practice Answer The answer is C. Regeneration is the process that uses cell division to regrow body parts.

Question 5 Which is the best answer? Standardized Test Practice Question 5 Which is the best answer? A. The instructions for making a specific gene are found in protein. B. Genes are found in the cytoplasm. C. The gene determines the order of amino acids in a protein. D. A change in the gene does not change the outcome of an inherited trait. LE 2.1a

Standardized Test Practice Answer The answer is C. Changing the order of the amino acids makes a different protein.

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