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Download Flow of Matter and Energy Through an Ecosystem
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Flow of Matter and Energy Through an Ecosystem How organisms obtain and use energy and matter Miscellaneous Vocab • DNA – Used in multicellular organisms such as vertebrates – Stored in the nucleus of cells • RNA – Used in all organisms Types of Organisms • Autotrophs (Producers) – Photoautotrophs – Chemoautotrophs • Heterotrophs – Consumers – Decomposers Food Web Flow of Matter • What does the food chain suggest about the flow of matter in an ecosystem? • What evidence do we have that matter is being converted? – First law of thermodynamics Flow of Energy • Entropy: chaos, disorder of molecules or energy – Second law of themodynamics • Is 100% of all energy truly conserved in useful form? • What is the original source of all the biosphere’s energy? The Most Epic Molecule Ever • ATP: all cells convert the food you eat into a morsel of energy called adenosine triphosphate, or ATP • ATP is like bite-sized bits of energy that a cell can actually break down Metabolism • The food you eat must be metabolized. – Metabolism: cellular process of breaking down organic molecules to make energy – Enzymes, which are specialized proteins, help this process by speeding it and other reactions up
