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Image Bank Sea Anemone-Radial Symmetry
Image Bank Lobster – Bilateral Symmetry
Image Bank Sponge – Asymmetrical Symmetry
Image Bank Giraffe
Image Bank Sea Star
Image Bank Animal Kingdom
Image Bank Sea Sponge
Image Bank Jellyfish
Image Bank Planarian
Image Bank Land Snail
Image Bank Crab
Image Bank Crab Shell
Image Bank Complete Metamorphosis
Image Bank Incomplete Metamorphosis
Image Bank Sea Urchin
Image Bank Lancelets
Image Bank Animal Kingdom
Image Bank Gills
Image Bank Rockfish
Image Bank Leopard Frog
Image Bank Iguana
Image Bank Amniotic Egg
Image Bank Ptarmigans
Image Bank Great Horned Owl
Image Bank Nursing Fawn
Image Bank Mountain Lion Skull
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Image Bank Beaver Skull
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Foldables Animals Make the following Foldable to compare and contrast the characteristics of invertebrates and vertebrates.
Foldables Fold one sheet of paper lengthwise.
Foldables Fold into thirds.
Foldables Unfold and draw overlapping ovals. Cut the top sheet along the folds.
Foldables Label the ovals as shown.
Foldables Construct a Venn Diagram As you read this chapter, list the characteristics unique to invertebrates under the left tab, those unique to vertebrates under the right tab, and those characteristics common to both under the middle tab.
Reviewing Main Ideas 1 What is an Animal? • Animals are many-celled organisms that must find and digest their own food. • Invertebrates are animals without backbones, and vertebrates have backbones. • Symmetry is the way that animal body parts are arranged. The three types of symmetry are bilateral, radial, and asymmetrical.
Reviewing Main Ideas 2 Invertebrate Animals • Sponges have no tissues. They filter water to obtain food and oxygen. • Cnidarians capture prey with stinging cells and have two layers of tissues. Flatworms and roundworms have organs and organ systems. • Mollusks have soft bodies. A mollusk usually has a shell and an open circulatory system. Annelids have segmented bodies.
Reviewing Main Ideas 2 Invertebrate Animals • Arthropods have jointed appendages and exoskeletons. • Echinoderms have spiny skin and a water-vascular system.
Reviewing Main Ideas 3 Vertebrate Animals • All chordates, at some time in their development, have a notochord, nerve cord, and pharyngeal pouches. • The body temperature of ectotherms changes with the surroundings. Endotherms maintain a constant body temperature. • All fish live in water. Most fish have gills, fins, and scales.
Reviewing Main Ideas 3 Vertebrate Animals • Amphibians spend some of their lives in water and part on land. Reptiles have dry, scaly skin and lay amniotic eggs. • Birds have feathers, wings, and lay eggs. • Mammals have fur or hair and feed their young with milk produced by the mother.
Chapter Review Question 1 According to this diagram, the animal kingdom is divided into _______. LE 1.1h
Chapter Review • animals that eat plants and those that eat • other animals • B. animals with a backbone and those without • a backbone LE 1.1h
Chapter Review C. animals with bilateral symmetry and those with radial symmetry D. animals with cells and those without cells LE 1.1h
Chapter Review Answer The correct answer is B. This chart shows how animals can be divided into invertebrates, those without a backbone, and vertebrates, those with a backbone. About 97 percent of all animals are invertebrates.
Chapter Review Question 2 Describe the asexual stage in the life cycle of this cnidarian. LE 4.1
Chapter Review Answer During the asexual stage the polyp, which developed from the larva, grows. The polyp then begins to form buds that become tiny medusae. After the medusae are released, they grow and begin the sexual cycle.