Unit 4 Topic 2

define evolution

species change over time through variations in their genetic traits, leading to the development of new species.

define microevolution

small-scale change in allele frequencies within a population over time, leading to gradual adaptations to the environment.

define macroevolution

large-scale evolutionary changes that occur over long periods of time, leading to the formation of new species or groups.

determine episodes of evolutionary radiation and mass extinctions from an evolutionary timescale of life on Earth (approximately 3.5 billion years)

scientists can identify episodes of evolutionary radiation, where species rapidly diversify

determine episodes of evolutionary radiation and mass extinctions from an evolutionary timescale of life on Earth (approximately 3.5 billion years)

mass extinctions, where large numbers of species disappear.