https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:matter-and-energy-in-ecosystems/x0c5bb03129646fd6:photosynthesis-in-ecosystems/v/photosynthesis-in-ecosystems-ms 2022-10-21T22:40:33.613234713Z Photosynthesis in ecosystems Oxygen produced by photosynthesis is released and used by animals and plants in respiration. Animals depend (directly or indirectly) on food from photosynthetic organisms for growth and survival. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/10078a94-307b-43b2-8a22-e374ba22a8e1_1280_720_base.png Photosynthesis in ecosystems Oxygen produced by photosynthesis is released and used by animals and plants in respiration. Animals depend (directly or indirectly) on food from photosynthetic organisms for growth and survival. https://cdn.kastatic.org/ka-youtube-converted/_1U6uMmUJZU.mp4/_1U6uMmUJZU.mp4 104 Energy in ecosystems https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:matter-and-energy-in-ecosystems/x0c5bb03129646fd6:photosynthesis-in-ecosystems/a/photosynthesis-in-ecosystems 2026-06-30T14:20:41.927190319Z Key points: Photosynthesis in ecosystems Review your understanding of photosynthesis in ecosystems in this free article. article https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:matter-and-energy-in-ecosystems/x0c5bb03129646fd6:photosynthesis-in-ecosystems/e/understand-photosynthesis-in-ecosystems 2026-06-30T14:20:41.927190319Z Understand: Photosynthesis in ecosystems Check your understanding of photosynthesis in ecosystems in this set of free, standards-aligned practice questions. Khan Academy exercise https://www.khanacademy.org/science/grade-7-science-tx/xe25057200abc6bd6:matter-and-energy-in-ecosystems/xe25057200abc6bd6:energy-in-ecosystems/a/trophic-levels-and-ecological-pyramids 2026-06-30T14:20:41.927190319Z Learn and try: Trophic levels and ecological pyramids Learn how energy flows through trophic levels in ecosystems, how the 10% rule shapes energy pyramids, and how matter is continuously recycled through producers, consumers, and decomposers. article https://www.khanacademy.org/science/grade-7-science-tx/xe25057200abc6bd6:matter-and-energy-in-ecosystems/xe25057200abc6bd6:energy-in-ecosystems/e/apply-trophic-levels-and-ecological-pyramids 2026-06-30T14:20:41.927190319Z Apply: Trophic levels and ecological pyramids Apply your understanding of trophic levels, food chains, and energy pyramids in this set of free, standards-aligned practice questions. Wieteke Holthuijzen exercise