Organisms that rely on other organisms for energy and nutrients are known as what?

Prepare for your Environmental Science Exam 1 with our interactive quiz. Test your knowledge with various question types featuring detailed explanations. Start today and ace your exam!

Multiple Choice

Organisms that rely on other organisms for energy and nutrients are known as what?

Energy in ecosystems comes from two paths: some organisms make their own energy-rich organic molecules from inorganic sources, while others must obtain energy by consuming or absorbing compounds from other organisms. Organisms that rely on other organisms for energy and nutrients fall into the category of heterotrophs. They can’t perform photosynthesis or chemosynthesis to build their own food, so they must eat, graze, prey, or decompose material produced by others to meet their energy and carbon needs. This includes a wide range of life, from animals to fungi and many bacteria. Autotrophs, by contrast, produce their own energy and organic matter from light or inorganic chemical energy, so they are considered producers rather than relying on others. Decomposers are indeed heterotrophs, but their distinctive role is breaking down dead material; the broader term that captures the idea of needing energy from other organisms is heterotrophs.

Energy in ecosystems comes from two paths: some organisms make their own energy-rich organic molecules from inorganic sources, while others must obtain energy by consuming or absorbing compounds from other organisms. Organisms that rely on other organisms for energy and nutrients fall into the category of heterotrophs. They can’t perform photosynthesis or chemosynthesis to build their own food, so they must eat, graze, prey, or decompose material produced by others to meet their energy and carbon needs. This includes a wide range of life, from animals to fungi and many bacteria.

Autotrophs, by contrast, produce their own energy and organic matter from light or inorganic chemical energy, so they are considered producers rather than relying on others. Decomposers are indeed heterotrophs, but their distinctive role is breaking down dead material; the broader term that captures the idea of needing energy from other organisms is heterotrophs.

More practice questions