Which is untrue?
a. Photoheterotrophic microorganisms that use photoenergy, but depend on organic matter as a carbon source, are abundant and widespread
b. Algae are photoautotrophs
c. Some bacteria, such as cyanobacteria, photosynthesize
d. All fungi and protozoans are chemoheterotrophs
e. Chemoautotrophic microorganisms use CO2 for biomass and oxidize substances such as NH4+ for energy