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Lecture Biology (6e) - Chapter 10: Photosynthesis. This chapter presents the following content: Plants and other autotrophs are the producers of the biosphere, chloroplasts are the site of photosynthesis in plants. | CHAPTER 10 PHOTOSYNTHESIS Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A: Photosynthesis in Nature 1. Plants and other autotrophs are the producers of the biosphere 2. Chloroplasts are the site of photosynthesis in plants Life on Earth is solar powered. The chloroplasts of plants use a process called photosynthesis to capture light energy from the sun and convert it to chemical energy stored in sugars and other organic molecules. Introduction Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Photosynthesis nourishes almost all of the living world directly or indirectly. All organisms require organic compounds for energy and for carbon skeletons. Autotrophs produce their organic molecules from CO2 and other inorganic raw materials obtained from the environment. Autotrophs are the ultimate sources of organic compounds for all nonautotrophic organisms. Autotrophs are the producers of the biosphere. 1. Plants and other autotrophs are the producers of the biosphere Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Autotrophs can be separated by the source of energy that drives their metabolism. Photoautotrophs use light as the energy source. Photosynthesis occurs in plants, algae, some other protists, and some prokaryotes. Chemoautotrophs harvest energy from oxidizing inorganic substances, including sulfur and ammonia. Chemoautotrophy is unique to bacteria. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Fig. 9.1 Heterotrophs live on organic compounds produced by other organisms. These organisms are the consumers of the biosphere. The most obvious type of heterotrophs feed on plants and other animals. Other heterotrophs decompose and feed on dead organisms and on organic litter, like feces and fallen leaves. Almost all heterotrophs are completely dependent on photoautotrophs for food and for oxygen, a byproduct of photosynthesis. Copyright © 2002 Pearson . | CHAPTER 10 PHOTOSYNTHESIS Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A: Photosynthesis in Nature 1. Plants and other autotrophs are the producers of the biosphere 2. Chloroplasts are the site of photosynthesis in plants Life on Earth is solar powered. The chloroplasts of plants use a process called photosynthesis to capture light energy from the sun and convert it to chemical energy stored in sugars and other organic molecules. Introduction Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Photosynthesis nourishes almost all of the living world directly or indirectly. All organisms require organic compounds for energy and for carbon skeletons. Autotrophs produce their organic molecules from CO2 and other inorganic raw materials obtained from the environment. Autotrophs are the ultimate sources of organic compounds for all nonautotrophic organisms. Autotrophs are the producers of the biosphere. 1. Plants and other .
