BIOL 1000 Study Guide - Final Guide: Electromagnetic Spectrum, Phytochrome, Photomorphogenesis
14 Dec 2016
School
Department
Course
Professor
Document Summary
Chapter 1: light and evolution: eg. thymine dimer formation. Dna damage, which changes the dna structure, preventing dna replication at that site. Electromagnetic radiation: sun converts 4 million tonnes of matter into energy each second and travels in the form of wave at speed of light and reaches earth in 8 minutes. Wavelength of light: the visible region of the electromagnetic spectrum that humans can detect with their eyes. Photoreceptor: a sensory receptor that detects the energy of light. Absorption spectrum: curve representing amount of light absorbed at each wavelength. Eyespot: a light sensitive structure that is approximately 1 um in diameter: found within the chloroplast of the cell (cell membrane, allows cell to gather information about light direction and intensity. Organisms without eyes use their environment to sense different light intensity and their directions: connected to mechanisms involved in swimming, involved in swimming away/towards light (phototaxis)
