BIOLOGY 1M03 Chapter Notes - Chapter 9 and 10: Callosity, Thermoluminescence Dating, Flowering Plant
15 May 2017
School
Department
Course
Professor
Document Summary
Overview: hu(cid:373)a(cid:374)"s evolution in its entirety began with the origin of cellular life (3. 8billion yrs ago, very recent portion is what we will be focussed on. First true mammals: cenozoic era (65 mya-present) radiation of mammals, extinction of dinosaurs, probably linked to diversification of angiosperm/flowering plants. Ferns: spores have not little food resources gymnosperms, produce ovules no cover, (cid:862)(cid:374)aked seed(cid:863) Diversification of angiosperms: by the late cretaceous (65 mya), angiosperms dominated habitat formerly occupied by ferns and cycads large canopy-forming angiosperms replaced conifers as the dominant trees. Relationships between angiosperms and animals: angiosperms need animals for pollination, defense, and dispersal, angiosperms are not first plant to have mutualistic relationship with animals they reward animals with nectar, fruit, shelter. Radiometric methods can have large confidence intervals or may not be appropriate for a particular site. They are often supplemented with relative dating methods: magnetic reversals, extinct and distinct species of animals.
