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BSC 400-1

BSC 400

TermDefinition
Fossils Remains or remnants of Extinct organisms
Stratification oldest rocks and thus fossils found deeper in sediments
C-14 Half Life 5730 years as it is converted to N-14
Uranium 238 half life 4.5 by
Horse Evolution-phylogenic series of taxa Hyracotherium (55mya, Eocene Epoch)> Mesohippus (34mya, Oligocene Epoch)> Merychippus (15 mya, Miocene Epoch)> Pliohippus (10mya, Miocene Epoch)> Equus (2mya, Pleistocene Epoch)
Dinosars were undoubtedly colorful and active
Kinds of structures: Primitive/Ancestral, General, Advanced/Derived, Specified, Homologous, Analogous, Homoplasy
Primitive/Ancestral Structure* Present early in evolutionary history (Ex:gills)
Advanced/Derived Structure* Arises later in evolutionary history; unique function or location to grp of organisms in certain offshoot (Ex: thermal pit in some snakes)
Specialized Structure* Performs specific function very well
Generalized Structure* Performs variety of functions adequately well
Homologous Structure* derived from same structure of common ancestor-linked by fossil record (serial homology*), develop ontogenetically from same primordial region of embryo, and/or perform same function
Homoplasy* structures that look alike and may or may not be homolgous or analogous
Analogous structure* structures that appear similar bc perform similar fnctions bt not derived from common ancestor-developed different embryonically
Mimicry homoplasic design can serve to look like something else for protection (Ex: camoflage)
Biomechanics study of form and function, discipline of comparitive anatomy.
Function is a product of _______, both of which are products of ______ form; natural selection
Created by: katurgeon
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