Nonvascular plants Vascular plants Spore Gymnosperm Angiosperm Germinate

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Tubes for Transport –

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? No Seeds, Please! •

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? No Seeds, Please! Copyright

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Seed Power! • While

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Seed Power! Copyright ©

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Seed Power! • Cone-producing

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Seed Power! • Angiosperms

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Seed Power! – Exit

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? From Flower to Fruit

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Comparing cones and fruits

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? How Seeds Grow •

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? How Seeds Grow Copyright

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Copyright © Houghton Mifflin

Slides: 28

Download presentation

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Tubes for Transport • Nonvascular plants are simple plants that lack vascular tissue, which easily transports water from the ground into the plant. • They grow in damp places and almost never grow taller than 10 cm. • Nonvascular plants move materials by absorbing nutrients and water in the same way that a sponge absorbs water. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Tubes for Transport • Vascular plants have vascular tissues that allow them to move water, nutrients, and sugars across long distances. • Vascular plants have true leaves and roots. • Most plants, including trees, grasses, and shrubs, are vascular plants. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Tubes for Transport • Vascular tissue contains tiny tubes, which move water and nutrients up a plant in the same way that water moves up a straw. • Vascular tissue includes two kinds of smaller tubes. Xylem carries water and nutrients from the roots to the other parts of the plant. • Phloem carries sugar from the leaves to the rest of the plant. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? No Seeds, Please! • A spore is a single reproductive cell that can grow into a new plant. • Both nonvascular plants, such as mosses and liverworts, and vascular plants, such as ferns, use spores to reproduce. • All of these plants have 2 forms in their life cycles. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Seed Power! • While spores need to stay moist and sprout soon after release, seeds have a covering that protects them until conditions are right for sprouting. • Gymnosperms are plants that do not produce seeds in flowers. Gymnosperm seeds have a protective seed coat, but are not enclosed by fruit. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Seed Power! • Cone-producing plants, called conifers, are the most common gymnosperms. Conifers include pine, fir, spruce, and cedar trees. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Seed Power! • Angiosperms are plants that produce seeds in flowers. • Since angiosperm seeds are often enclosed in fruit, they are easily spread when animals eat the fruits. • Gymnosperm seeds may also be spread by animals, but typically fall to the ground and grow where they land. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? From Flower to Fruit and Seed • Typical flowers have both male and female reproductive parts. • A male part, the anther, produces pollen, or the sperm. • The female parts include the stigma and the ovary, which contains eggs in ovules. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? From Flower to Fruit to Seed • Identify the following parts of a flower: anther, ovary, ovules, petals, stigma. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? Comparing cones and fruits The seeds of the gymnosperms are attached to the outside of the cone scales with no coverings. The seeds of the angiosperms are completely covered by a fruit. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? From Flower to Fruit to Seed 1. Flowers produce nectar that organisms may eat. When an organism gathers nectar, pollen may brush onto it. 2. The organism carries this pollen when it moves to the next flower. This process is called pollination. 3. When the pollen reaches the stigma, it travels down to the ovary and fertilizes the ovules. This process is called fertilization. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? From Flower to Fruit to Seed • Fertilized ovules develop into seeds, and the ovule wall becomes a seed coat. The ovary that holds the seeds develops into the fruit, such as a pumpkin. • The development of a pumpkin seed into a mature pumpkin fruit follows a sequence of events… Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 3 How Do Plants Grow and Reproduce? How Seeds Grow • Seeds have a hard outer coat that protects them and allows them to rest until the environment is right for growing. • Many plant seeds rest during winter and then germinate, or start to grow, when the ground becomes warm and moist in the spring. Copyright © Houghton Mifflin Harcourt Publishing Company