Organisms that make their own food are described as which?

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Study for the Leaving Certificate Biology Test. Prepare with flashcards and multiple-choice questions. Each question includes hints and explanations to enhance learning. Get ready to excel in your exam!

Multiple Choice

Organisms that make their own food are described as which?

Explanation:
Making their own food means autotrophy. Autotrophs can synthesize organic molecules from inorganic carbon sources, like carbon dioxide, using energy from light or from chemical reactions. That ability sets them apart from heterotrophs, which must obtain already-made organic nutrients from others. While many autotrophs are photosynthetic, some obtain energy chemotrophically, so energy source isn’t enough on its own to define them. The key idea is carbon fixation into organic matter, which is why autotrophic correctly describes organisms that make their own food.

Making their own food means autotrophy. Autotrophs can synthesize organic molecules from inorganic carbon sources, like carbon dioxide, using energy from light or from chemical reactions. That ability sets them apart from heterotrophs, which must obtain already-made organic nutrients from others. While many autotrophs are photosynthetic, some obtain energy chemotrophically, so energy source isn’t enough on its own to define them. The key idea is carbon fixation into organic matter, which is why autotrophic correctly describes organisms that make their own food.

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