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# Energy Flow Through a Marine Ecosystem The document describes a food web pyramid, likely for a marine ecosystem, illustrating energy transfer between different organisms. The pyramid displays the different trophic levels and the energy content (in kcal) at each level. ## Trophic Levels The pyr...

# Energy Flow Through a Marine Ecosystem The document describes a food web pyramid, likely for a marine ecosystem, illustrating energy transfer between different organisms. The pyramid displays the different trophic levels and the energy content (in kcal) at each level. ## Trophic Levels The pyramid shows the following trophic levels: * **Producers:** Kelp (23,497,374 kcal) * **Primary Consumers:** Urchins (2,568,587 kcal) * **Secondary Consumers:** Sea otters (234,568 kcal) * **Tertiary Consumers:** Orca (22,450 kcal) The numbers represent the energy available at each level. ## Energy Transfer Processes The document also explains the energy transfer processes between organisms: * **Photosynthesis:** The kelp uses sunlight to produce food molecules (sugars). The chemical equation for photosynthesis is: $CO_2 + H_2O \rightarrow C_6H_{12}O_6 + O_2$ * **Cellular Respiration:** Consumers like urchins and otters use oxygen to break down food molecules to release energy. The chemical equation is: $C_6H_{12}O_6 + O_2 \rightarrow CO_2 + H_2O$ ## Organelles Involved * **Chloroplasts:** Site of photosynthesis in producers like kelp. * **Mitochondria:** Site of cellular respiration in consumers to utilize food molecules and generate energy. ## Questions Related to the Pyramid The document includes a list of questions designed to help understand the energy flow diagram. The questions are related to: 1. Processes for food creation and breakdown 2. Chemical equations 3. Energy source 4. Organelle roles 5. Consumer processes 6. Chemical equations again 7. Organelle locations 8. Trophic levels labeling 9. Percentage calculations The document then asks students to complete calculations and label the food web.