BIOLOGY 2F03 Chapter Notes - Chapter 7: Photosynthetically Active Radiation, Carboxylation, Kilogram
8 Feb 2016
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Document Summary
Sources of energy: light, organic and inorganic molecules. Rate of energy acquisition is limited. Optimal foraging theory helps explain choice and location of food items. Heterotrophic (uses organic matter), photosynthetic (light), chemotrophic. Diagram where size of circle means a lot, small circle means occasionally (not a lot). Heterotrophic is red, photo is green, and chemo is blue. Photosynthetic has most energy (highlighted) and it gives this to everyone else. Bacteria can be photosynthetic, hetero and chemo! Chemotrophic bacteria are quite common. Animals can take solar energy, but not directly. Many lower invertebrates use symbiotic algae in their tissues to live jointly and absorb energy that they photosynthesize. The link might be so strong, that for all purposes it is the animal that photosynthesizes. Prokaryotes draw on greater variety of energy sources than the eukaryotes. Visible light is better referred to as par. Photosynthetically active radiation measured by photon flux.
