Autotroph:
1. Organisms capable of utilizing inorganic carbon as their sole sopurce of carbon.
2. Autotrophs synthesize their organic nutrients from CO2, hence are self-nourishing.
3. These are either photoautotrophs (photo synthesis) or chemoautotrophs (chemosynthetic).
ADVERTISEMENTS:
Example – Green plants, chemoautotrophic bacteria.
Heterotroph:
1. Organisms unable to utilize inorganic carbon.
2. Heterotrouphs can not synthesize their own food but obtain the organic compounds from other organisms.
ADVERTISEMENTS:
3. These may be parasites, saprophytic, symbiotic or insectivorous plants.
Example – Cuscuta, Fungi, Rhizobium, Nepnthes.