PowerPoint® Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from Joan Sharp Copyright © 2008 Pearson Education, Inc., | Chapter 10 Photosynthesis Overview: The Process That Feeds the Biosphere Photosynthesis is the process that converts solar energy into chemical energy Directly or indirectly, photosynthesis nourishes almost the entire living world Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Autotrophs sustain themselves without eating anything derived from other organisms Autotrophs are the producers of the biosphere, producing organic molecules from CO2 and other inorganic molecules Almost all plants are photoautotrophs, using the energy of sunlight to make organic molecules from H2O and CO2 Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Fig. 10-1 Figure How can sunlight, seen here as a spectrum of colors in a rainbow, power the synthesis of organic substances? Photosynthesis occurs in plants, algae, certain other protists, and some prokaryotes These organisms feed not only themselves but also most of the living world . | Chapter 10 Photosynthesis Overview: The Process That Feeds the Biosphere Photosynthesis is the process that converts solar energy into chemical energy Directly or indirectly, photosynthesis nourishes almost the entire living world Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Autotrophs sustain themselves without eating anything derived from other organisms Autotrophs are the producers of the biosphere, producing organic molecules from CO2 and other inorganic molecules Almost all plants are photoautotrophs, using the energy of sunlight to make organic molecules from H2O and CO2 Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Fig. 10-1 Figure How can sunlight, seen here as a spectrum of colors in a rainbow, power the synthesis of organic substances? Photosynthesis occurs in plants, algae, certain other protists, and some prokaryotes These organisms feed not only themselves but also most of the living world BioFlix: Photosynthesis Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Fig. 10-2 (a) Plants (c) Unicellular protist 10 µm µm 40 µm (d) Cyanobacteria (e) Purple sulfur bacteria (b) Multicellular alga Figure Photoautotrophs Fig. 10-2a (a) Plants Figure Photoautotrophs Fig. 10-2b (b) Multicellular alga Figure Photoautotrophs Fig. 10-2c (c) Unicellular protist 10 µm Figure Photoautotrophs Fig. 10-2d 40 µm (d) Cyanobacteria Figure Photoautotrophs Fig. 10-2e µm (e) Purple sulfur bacteria Figure Photoautotrophs Heterotrophs obtain their organic material from other organisms Heterotrophs are the consumers of the biosphere Almost all heterotrophs, including humans, depend on photoautotrophs for food and O2 Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Concept : Photosynthesis converts light energy to the chemical energy of food Chloroplasts are structurally similar to and likely evolved .
