BIOL 121 Lecture Notes - Lecture 1: Chon, Complex Cell, Simple Cell
Document Summary
Biodiversity: a relatively new term, recently formalized by a famous biologist, now used defined and used in this course; includes genetic, species, and ecosystem/ecological. Unity of life: control, need for energy, chnops carbs, lipids, protein, dna. Prokaryotes: bacteria, simple cell, ruled for about 3 billion years, some photosynthetic, pump oxygen into atmosphere, changed rocks/atmosphere, lack nucleuseukaryotes: complex cell, sexual reproduction, various cell organelles, came along in last half billion years, now dominate. Classification of organisms: derivation of scientific names type specimens (holotype etc. ) museums cyanobacteria: prokaryotes, blue green, photosynthetic, gave earth its oxygen*copy and memorize pp. Domain archaea: recently discovered, hot springs/deep ocean vents, love extreme environments. Kingdom animalia, kingdom fungi, kingdom plantae, kingdom protista. Humans more related to archaea classification of orgs> concept of biological species> differences between species>macroevolution (homology)> biodiversity classification of orgs> concept of biological species>variation within spp. > changes within species (microevolution)> biodiversity. Evolutionary history of our representative organisms estimates of 2-10 million species;
