Slide 1
Photosynthesis is the process that converts solar energy into chemical energy
Directly or indirectly, photosynthesis nourishes almost the entire living world
Slide 2
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
Slide 3
Fig. 10-1
Slide 4
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
Slide 5
Fig. 10-2
(a) Plants
(c) Unicellular protist
10 µm
1.5 µm
40 µm
(d) Cyanobacteria
(e) Purple sulfur
bacteria
(b) Multicellular alga
Slide 6
Fig. 10-2a
(a) Plants
Slide 7
Fig. 10-2b
(b) Multicellular alga
Slide 8
Fig. 10-2c
(c) Unicellular protist
10 µm
Slide 9
Fig. 10-2d
40 µm
(d) Cyanobacteria
Slide 10
Fig. 10-2e
1.5 µm
(e) Purple sulfur
bacteria
Slide 11
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
Slide 12
Concept 10.1: Photosynthesis converts light energy to the chemical energy of food
Chloroplasts are structurally similar to and likely evolved from photosynthetic bacteria
The structural organization of these cells allows for the chemical reactions of photosynthesis
Slide 13