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Unit 3 Lesson 4 What Are Structural Adaptations?
Copyright © Houghton Mifflin Harcourt Publishing Company 1
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Adaptations adapted from
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Unit 3 Lesson 4 What Are Structural Adaptations?
Staying Alive An adaptation is any trait that helps a living thing to survive. Copyright © Houghton Mifflin Harcourt Publishing Company 3
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Unit 3 Lesson 4 What Are Structural Adaptations?
Staying Alive A horse has flat teeth that allow it to grind the grass that it eats. Copyright © Houghton Mifflin Harcourt Publishing Company 4
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Staying Alive A tiger has sharp teeth that help it tear meat.
Unit 3 Lesson 4 What Are Structural Adaptations? Staying Alive A tiger has sharp teeth that help it tear meat. Copyright © Houghton Mifflin Harcourt Publishing Company 5
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Unit 3 Lesson 4 What Are Structural Adaptations?
Staying Safe A skunk’s spray has a bad odor. It’s a powerful defense against predators. Copyright © Houghton Mifflin Harcourt Publishing Company 6
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Staying Safe One adaptation is fur color.
Unit 3 Lesson 4 What Are Structural Adaptations? Staying Safe One adaptation is fur color. Snow hare is rusty brown in summer and in winter its fur turns white. Copyright © Houghton Mifflin Harcourt Publishing Company 7
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adapted from http://gideon. k12. mo
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Unit 3 Lesson 4 What Are Structural Adaptations?
Creature Costumes Some animals can hide without trying. These animals are hidden by their shapes, colors, or patterns. Such disguises are called camouflage. Copyright © Houghton Mifflin Harcourt Publishing Company 10
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Unit 3 Lesson 4 What Are Structural Adaptations?
Creature Costumes What color should this lizard be to camouflage with the leaf? Copyright © Houghton Mifflin Harcourt Publishing Company 11
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Unit 3 Lesson 4 What Are Structural Adaptations?
Creature Costumes Imitating the look of other animals is called mimicry. Monarch butterflies make birds sick. Viceroy butterflies mimic them to prevent getting eaten. Copyright © Houghton Mifflin Harcourt Publishing Company 12
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Unit 3 Lesson 4 What Are Structural Adaptations?
Plant Facts Desert plants such as cactuses have thick stems that store water. Copyright © Houghton Mifflin Harcourt Publishing Company 14
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Unit 3 Lesson 4 What Are Structural Adaptations?
Plant Facts Plants need water. There isn’t much water in a desert, so desert plants are adapted to hold moisture. Desert plants such as cactuses have thick stems that store water. The leaves of many desert plants have a waxy coating that helps prevent water loss. Most desert plants have spines that help prevent water vapor from escaping from the plant. Copyright © Houghton Mifflin Harcourt Publishing Company 15
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