Organisms that can produce their own food and feed themselves are called self-feeders autotrophs heterotrophs

autotrophs

Explanation:

Autotrophs are the organisms which are capable of producing their own food by the process of photosynthesis. These includes plants, diatoms and some bacteria and some protist. The process of photosynthesis involves the carbon dioxide, water in the presence sunlight produces carbohydrates and oxygen.

electronic measurement tools display data on a screen after waiting for several minutes.

while some business owners prefer manual record keeping systems, most businesses use an electronic record keeping system - making it easier to capture information, generate reports and meet tax and legal reporting requirements.

explanation:

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.