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Ch 18: AP Biology: Plant Reproduction and Growth

About This Chapter

Watch video lessons on plant reproduction and growth and learn about the alternation of generations, plant life cycles, the function of flowers, and more. These lessons are just a portion of our AP Biology course.

Plant Reproduction and Growth - Chapter Summary and Learning Objectives

While flowers and seeds are one way that plants reproduce, they have many ways to create new offspring during their complex life cycles. In this chapter, our instructors will show you the exciting life of plants. You'll see how they alternate forms between generations and how some plants live most of their life in one form or the other. You'll understand how different types of plants are able to reproduce and the methods by which they do so. You'll also take a look at how plants grow according to seasons, their environment, and chemical signals from within. This chapter is designed to teach you:

  • The alternation of generations life cycle
  • The reproductive mechanisms of different plants
  • How plants respond to their environments
  • How plants grow according to their type

VideoObjective
Alternation of Generations: The Gametophyte and the SporophyteUnderstand the basic life cycle of plants and how they differ from animals.
A Moss Life Cycle: Dominant GametophyteTake a look at how non-vascular mosses spend most of their lives with one set of genetic material.
A Fern Life Cycle: Plant Reproduction Without Flowers or SeedsExplore how vascular ferns are able to reproduce without using seeds.
A Gymnosperm Life Cycle: Reproduction of Plants with 'Naked Seeds'See how plants like pine trees reproduce with unprotected seeds.
An Angiosperm Life Cycle: Flowering Plant ReproductionExamine the role of flowers and fruit in the plant life cycle.
Asexual Plant Reproduction: Vegetative Propagation and BulbsStudy the ways that plants can reproduce without seeds, pollen, or flowers.
Tropisms: Phototropic, Geotropic, and Thigmotropic Plant GrowthUnderstand how certain plants respond to their environment.
Photoperiodicity: Short-day, Long-day, and Day-Neutral PlantsTake a look at the effect of the length of daylight on flowering plants.
Seasonal Growth Cycles: Perennial, Annual, and Biennial PlantsExplore the categories of plants that have different patterns of growth.
Plant Hormones: Chemical Control of Growth and ReproductionSee the chemical signals used to control growth and reproductive functions in plants.

10 Lessons in Chapter 18: AP Biology: Plant Reproduction and Growth
Test your knowledge with a 30-question chapter practice test
Alternation of Generations: The Gametophyte and Sporophyte

1. Alternation of Generations: The Gametophyte and Sporophyte

The life cycle of a plant is called the alternation of generations. It is a complex cycle with many different life stages that can be be both diploid and haploid. Explore the life cycle of a plant and the roles gametophyte and sporophyte play in that cycle in this lesson.

A Moss Life Cycle: Dominant Gametophyte

2. A Moss Life Cycle: Dominant Gametophyte

Mosses are small plants that may seem forgettable, but they serve many vital roles, such as habitats for certain organisms, a biological fuel source, and a decorative part of flower arrangements. Learn about the life cycle of mosses, including the haploid and diploid stages, and understand moss gametophytes.

A Fern Life Cycle: Plant Reproduction Without Flowers or Seeds

3. A Fern Life Cycle: Plant Reproduction Without Flowers or Seeds

Ferns are able to reproduce without using seeds. We will look at how ferns reproduce as well as the pattern of alternating between diploid and haploid life stages.

A Gymnosperm Life Cycle: Reproduction of Plants with 'Naked Seeds'

4. A Gymnosperm Life Cycle: Reproduction of Plants with 'Naked Seeds'

Gymnosperms are plants that produce naked seeds. Move through the stages of life with the gymnosperm during this lesson and discover what happens during the haploid and diploid stages of the gymnosperm's life cycle.

An Angiosperm Life Cycle: Flowering Plant Reproduction

5. An Angiosperm Life Cycle: Flowering Plant Reproduction

Flowering plants, or Angiosperms, produce protected seeds to reproduce. This lesson includes a detailed description of Angiosperm life cycles and the alternation of generations, including the Haploid stage and the Diploid stage. The lesson will also describe double fertilization, endosperms, and the production of flowers as specialized structures for reproduction.

Asexual Plant Reproduction: Vegetative Propagation and Bulbs

6. Asexual Plant Reproduction: Vegetative Propagation and Bulbs

Many plants propagate using pollen and seeds, but asexual reproduction is also common. Explore how asexual plant reproduction occurs through the vegetative propagation of bulbs, tubers, rhizomes, stolons, and human intervention using grafting and cuttings.

Tropisms: Phototropic, Geotropic and Thigmotropic Plant Growth

7. Tropisms: Phototropic, Geotropic and Thigmotropic Plant Growth

Explore the key types of tropisms that allow plants to respond to their environment. Learn to define tropism and explore phototropic, geotropic, and thigmotropic plant growth.

Photoperiodicity: Short-day, Long-day and Day-Neutral Plants

8. Photoperiodicity: Short-day, Long-day and Day-Neutral Plants

Photoperiodism is an organism's response to the length of the day vs the length of the night. The length of daylight can affect the growth of a plant. Discover how plants are classified into short-day, long-day, and day-neutral plants based upon their exposure to daylight in this lesson.

Seasonal Growth Cycles: Perennial, Annual and Biennial Plants

9. Seasonal Growth Cycles: Perennial, Annual and Biennial Plants

There are a number of environmental factors that influence the growth cycles of plants. Examine these influences and learn how to differentiate between annuals, biennials, and perennials.

Plant Hormones: Chemical Control of Growth and Reproduction

10. Plant Hormones: Chemical Control of Growth and Reproduction

Like in humans, plants have hormones that are chemical receptors that control growth and reproduction. Learn about the function of hormones and the four different types of hormones found in plants.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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