Organisms that make their own organic compounds.
Use energy and inorganic molecules to synthesise organic molecules
Examples: plants, algae and many bacteria
Autotrophs (self-feeders)
Energy for carbon fixation from inorganic chemical reactions.
Chemosythetic autotrophs
Chemoautotrophs, they live in environments where hydrogen is available. Energy is obtained from a carbon-fixing in which carbon dioxide and hydrogen react to form a simple organic molecule: methane.
Methanogens
– Organisms that obtain the energy required for carbon fixation from light or sunlight.
Combines carbon dioxide and water using solar energy to produce organic compounds
Examples: Algae, Euglena and cyanobacteria
Photosynthesis autotrophs
Turns inorganic carbon into organic compounds
Carbon fixation
Organisms that are unable to make their own food
Cannot use simple inorganic substances to make organic compounds. They obtain from other organisms.
Examples: bacteria, animals and fungi
Heterotrophs
Organisms with a broad diet that are ale to eat a mixture of both plants and animals.
Examples: Humans, bears and lizards
Omnivorous heterotroph
Obtain their energy and nutrients directly from other living organisms.
Examples:
Tapeworm (endoparasites)
Ticks (ectoparasites)
Parasitic hetertrophs
Feed on dead and decaying organic material
Examples: strawbeery and fruits
Saprotrophic heterotroph
