Chapter 30 - Plant diversity II: The evolution of seed plants. This chapter presents the following content: This chapter explain why pollen grains were an important adaptation for successful reproduction on land; list the four phyla of gymnosperms; describe the life history of a pine; indicate which structures are part of the gametophyte generation and which are part of the sporophyte generation;. | CHAPTER 30 PLANT DIVERSITY II: THE EVOLUTION OF SEED PLANTS Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A: Overview of Seed Plant Evolution 1. Reduction of the gametophyte continued with the evolution of seed plants 2. Seeds became an important means of dispersing offspring 3. Pollen eliminated the liquid-water requirement for fertilization 4. The two clades of seed plants are gymnosperms and angiosperms The evolution of plants is highlighted by two important landmarks: (1) The evolution of seeds, which led to the gymnosperms and angiosperms, the plants that dominate most modern landscapes. (2) The emergence of the importance of seed plants to animals, specifically to humans. Introduction Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Agriculture, the cultivation and harvest of plants (primarily seed plants), began approximately 10,000 years ago in Asia, Europe, and the Americas. This was the single most important cultural change in the history of humanity, for it made possible the transition from hunter-gatherer societies to permanent settlements. The seeds and other adaptations of gymnosperms and angiosperms enhanced the ability of plants to survive and reproduce in diverse terrestrial environments. Plants became the main producers on land. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Seed plants are vascular plants that produce seeds. Contributing to the success of seed plants as terrestrial organisms are three important reproductive adaptations: Continued reduction of the gametophyte. The advent of the seed. The evolution of pollen. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings An important distinction between mosses and other bryophytes and ferns and other seedless vascular plants is a gametophyte-dominated life cycle for bryophytes and a sporophyte-dominant life cycle for seedless vascular plants. Continuing that trend, the gametophytes . | CHAPTER 30 PLANT DIVERSITY II: THE EVOLUTION OF SEED PLANTS Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A: Overview of Seed Plant Evolution 1. Reduction of the gametophyte continued with the evolution of seed plants 2. Seeds became an important means of dispersing offspring 3. Pollen eliminated the liquid-water requirement for fertilization 4. The two clades of seed plants are gymnosperms and angiosperms The evolution of plants is highlighted by two important landmarks: (1) The evolution of seeds, which led to the gymnosperms and angiosperms, the plants that dominate most modern landscapes. (2) The emergence of the importance of seed plants to animals, specifically to humans. Introduction Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Agriculture, the cultivation and harvest of plants (primarily seed plants), began approximately 10,000 years ago in Asia, Europe, and the Americas. This was the single most important .
