With respect to carbon-
- Organic- Heterotrophs
- Carbon Dioxide- Autotrophs
With respect to energy-
- Light- Phototrophs
- Chemical compounds-Chemotrophs.
Photoautotrophs- these are the organisms that uses the light
energy to prepare their own food, Examples are plants and all
photosynthetically active organisms.
Chemoautotrophs- They use inorganic energy sources to synthesize
organic compounds from carbon dioxide.Examples
are-Archibacteria
Photoheterotrophs-They use light as energy source, but cannot
use carbon dioxide as their sole carbon source.example-
Heliobacteria
Chemoheterotrophs-These organisms utilizes chemical energy to
produce acrbohydrates.Example-hydrogenovibrio crunogenus.
Saprobe-they derive their nutrition from dead and decaying
organisms. example-Fungus
Parasite- the organisms which lives inside another organisms.
They derive their nutrition from that organisms.Example-tapeworm ,
Barnacles.
