BIOL 1000 Chapter Notes - Chapter 8: Horizontal Gene Transfer, Hydrogen Sulfide, Collagen
4 Oct 2013
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Ch 1, ch 2, ch 3 (3. 1, 3. 4 3. 5) 5. 1 5. 2 purple pages 40-43. Source of energy that directly or indirectly sustains virtually all organisms. Provides organisms infomation about the physical world that surrounds them. Light is the portion of the electromagnetic spectrum that humans can detect with their eyes. Composed of a stream of energy particles called photons absorbed by electrons. Electromagnetic radiation: a kind of radiation including visible light, radio waves, gamma rays, and x-rays, in which electric and magnetic fields vary simultaneously. Shorter wavelengths more energy (higher energy photons) Longer wavelengths less energy (lower energy photons) successive. *this can only happen if photon energy equals energy diff. b/w electrons ground state and excited state, if doesn"t match, it is transmitted or reflected. Molecules that can absorb photons of light. Bonding arrangement called conjugated system of delocalized electrons, where none are.
