100m quoin Ip Whale O O Birch 10m Dogwood O BAlsam Rhino O Elephant Elk o Bearo human Deer Oo S 体 Beave 10 cm Rat oa Crab o Horseshoe crab 型 Mouse ○Newt Fro Bee Snail Chameleon I cm Oyster HOrse fly 效 O House fly O Clam Daphnia O Drosophila mm Stentor O 应 100 um The common mud turtle's Tetrahymena generation time is close OO Euglena to that of other organisms o Spirochaeta IO um of similar size E. coli o Pseudomonas ○B.aueu Iu Generation time体型效应