Ch_08 - The Green Worlds Gift Photosynthesis Introduction:...

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The Green World’s Gift Photosynthesis Introduction: Photosynthesis and Energy Relevance. Try to name something you eat that isn t from a plant, or from an animal that ate a plant. All food comes from plants. Molecules of our bodies are made from food we eat, but plants make their own food from sunlight. Food is used for creating macromolecules from monomers like glucose and amino acids. Introduction: Photosynthesis and Energy Relevance. All food comes from plants. More importantly, food is used in respiration to generate cellular energy, ATP. Plants are the nearly universal source of energy for all living things. Plants take energy-poor reactants (water and carbon dioxide) and use solar energy to drive the uphill reaction of trapping those reactants in complex, ordered bonds of glucose. Oxygen needed for respiration is produced as a by-product of photosynthesis. Light Energy Drives Photosynthesis Nature of Light. Energetic rays have different wavelengths in a spectrum from gamma rays to radio waves, only a portion of which is visible light. Explain what it means to see a plant as red or green in terms of absorption and reflection, and why a black car is hotter on a sunny day than a white car. (Black absorbs all light and reflects none; white absorbs little and reflects almost all.) Explain what it means to absorb light by a pigment. Photosynthesis driven by only part of the visible spectrum (blue and red); plant pigments in the green plant reflects
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green and absorbs blue and red. Light Energy Drives Photosynthesis
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This note was uploaded on 02/25/2012 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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Ch_08 - The Green Worlds Gift Photosynthesis Introduction:...

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