BIOL1300 Lecture Notes - Lecture 1: Gametophyte, Photosynthesis, Vascular Plant
Document Summary
Tertiary: ( no more dinosaurs) ( paleogene, and meliogine) categories change. Cretaceous period: also during this time, we find the first fossils of many insect groups, modern mammal and bird groups, and the first flowering plants. Jurassic period: while the dinosaurs appeared in the triassic, it was during the jurassic that they prodigiously radiated and ascended to be the rulers of the land. Triassic period: dinosaurs, marine reptiles appeared , etc. ( 95% of marine species, 70-80% of land animal) 6- permian: no land animal larger than the size of domestic dog, besides crocodilians. ( finished trilobites) Most profound perhaps was the colonization of land. Terrestrial arthropod fossils occur in ordovician strata, as do microfossils of the cells, cuticle, and spores of the early land-based plants. 1- cambrian: rocks( hedian precambrian, of this age were first studied. Hard-shelled animals appeared in great numbers for the first time during the cambrian, significantly because shallow seas flooded the continents.
