EEMB 136 Study Guide - Final Guide: Crown Group, Vegetative Reproduction, Antheridium
15 Nov 2017
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Inherit in land plant and origin of seed. Within sporangia-> generate spore (megaspore and microspore)-> undergo meiosis-> spore become haploid-> spore becomes gametophytes (antheridium and archegonium)-> fertilization-> zygote tetrahedral tetrads. Important: indication stem group to terrestrial land plant. Deposition of massive amounts of coal at the equator. The accumulation of coal (buried organic matter) free huge amount of oxygen. Allow plants to invade hostile environment by rare sexual reproduction. When the descendent lineage has double the chromosome than the ancestral. When the descendent lineage has double the chromosome than the ancestral lineage. Give plants another set of tool to create diversity. So error in developmental stage can be lethal. When a characteristic that has 1 function is co-offed to another function. 2 bones of jaw-> middle ear of mammals. Feathers-> used to keep one warm, then to insulation of flight. Disappearance of the clovis culture is now correlated with a possible impact in n. america.
