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BIOL 3040 (27)
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Ch 13 Objectives

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Biological Sciences
BIOL 3040
All Professors

Chapter Learning ObjectivesChapter 13 Evolution and Development131 EvoDevo A Brief HistoryDefine ontogenyothe development of an individual over its lifetimeCompare and contrast the ideas about ontogeny and evolution put forward by the Greeks Meckel and von BaeroGreeks all life was moving from the simple to the complex scala naturae They argued that the development of an individual over its lifetime stepped through simple traits early in development to more complex traits later in the developmental process oMeckel the developmental stages of the individual paralleled the evolutionary history of the species being studied The developmental stages of an organism step through all the animal species that came before it on the scala naturaeoVon Baer the general characteristics of embryos in closely related species develop before specific characteristics and embryos of higher taxa do not resemble the adult form of ancestral lowertaxa species The most general characteristics that unite embryos from closely related species appear early on in embryonic development while specialized traitsthose that start to distinguish embryos of different species from one anotherappear later in developmentDistinguish the four types of heterochrony and describe which one the axolotls fall underPAGE 437oAcceleration When a somatic trait is accelerated relative to the appearance of a reproductive trait and the so
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