BIOL 1000 Lecture Notes - Lecture 6: Electromagnetic Spectrum, Chlamydomonas, Dynein
16 May 2016
School
Department
Course
Professor
Document Summary
Define: photon, pigment, photoreceptor, dna, gene, and allele. Describe, in general terms, the evolution of image forming eyes from early simple regions of photoreceptor cells. The visible region of the electromagnetic spectrum that humans can detect with their eyes. Described according to its wavelengths but behaves as particles called photons. Interacts with matter by: reflecting off an object, transmitting through an object, absorbed by light. All life depends upon capturing energy from the sun and converting it into a form a living organism can use. Many organisms use light as a source of information. Evolution of the camera eye: region of the photosensitive cells, depressed folded area allows limited directional sensitivity c) Pinhole eye allows finer directional sensitivity and limited imaging: transparent humor develops in enclosed chamber, distinct lens develop f) Limpet/slit shell snail: simple layer of photosensitive cells. Role of light in ecology and behaviour: circadian rhythms (controlled by an internal, camouflage, using colour as signals.
