Big Idea Big Idea Big Idea 1. The process of evolution drives the diversity and unity of life. 1.c.1: Speciation and extinction 24.3, 24.4, 25.4 Five major extinctions • have occurred throughout the impact on ecosystems and species • Earth’s history, extinction rates 1.c.2: Speciation may occur when 24.1 two populations become reproductively isolated from each other. 1.c.3: Populations of organisms 24.2 Chemical resistance • continue to evolve. Emergent diseases • Observed directional phenotypic • change in a population A eukaryotic example that describes • evolution of a structure or process such as heart chambers, limbs, the brain and the immune system. 1.d.1: There are several 4.1, 25.1, 25.3 hypotheses about the natural origin of life on Earth, each with supporting scientific evidence 1.d.2 Scientific evidence from 26.6 many different disciplines supports models of the origin of life.
Big Idea Big Idea Big Idea 1. The process of evolution drives the diversity and unity of life. 1.c.1: Speciation and extinction have occurred throughout the Earth’s history, 24.3, 24.4, 25.4 • Five major extinctions • impact on ecosystems and species extinction rates 1.c.2: Speciation may occur when two populations become reproductively isolated from each other. 24.1 1.c.3: Populations of organisms continue to evolve. 24.2 • Chemical resistance • Emergent diseases • Observed directional phenotypic change in a population • A eukaryotic example that describes evolution of a structure or process such as heart chambers, limbs, the brain and the immune system. 1.d.1: There are several hypotheses about the natural origin of life on Earth, each with supporting scientific evidence 4.1, 25.1, 25.3 1.d.2 Scientific evidence from many different disciplines supports models of the origin of life. 26.6