Chapter 24 forum notes bio

Chapter 24 forum notes bio - Chapter 24 SPECIATION the...

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Chapter 24 S PECIATION the process by which one species splits into two or more species M ICROEVOLUTION changes over time in allele frequencies in a population M ACROEVOLUTION the broad pattern of evolution over long time spans Species means kind of appearance in Latin Biological species concept Species they have the potential to interbreed in nature and produce viable, fertile, offspring, but can’t with other such groups An example is that humans are very diverse, but we can all still interbreed This concept emphasizes the separateness of species R EPRODUCTIVE I SOLATION the existence of biological factors (barriers) that impede members of two species from producing fertile, viable offspring H YBRIDS offspring that result from an interspecific mating P REZYGOTIC BARRIERS meaning “before the zygote”, blocks fertilization from occurring P OSTZYGOTIC BARRIERS these barriers may contribute to reproductive isolation after the hybrid is born M ORPHOLOGICAL
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