Autotrophs take in food from the outside world and convert them into stored forms of energy. This material is taken in the form of carbon dioxide and water which is converted into carbohydrates in the presence of sunlight and chlorophyll.

The absence of amylase in the saliva thus affects the breakdown of starch into simpler sugar molecules. As we know that, the process of digestion begins in the mouth. The mouth contains a digestive enzyme, salivary amylase. This enzyme breaks ...

These are saprotrophs and digestion in saprotrophs take place before ingestion. They break down and convert complex organic molecules present in dead and decaying matter into simpler substances outside their body.