2 most common types of fossils - mold and cast, Relative Dating - younger (top) vs. older (bottom), Absolute Dating - more exact, gives a number, Geologic time scale - earth’s history broken into ERAS, Natural Selection - survival of the fittest - nature chose the competitive adaptation, Variation - slight difference in inherited traits, Adaptation - inherited trait that increases chance of survival, Artificial Selection/Selective breeding - breeding for desired characteristics - humans chose, Homologous Structure - same build - limb of human, dolphin, bat…, Analogous Structure - same job - wings for flight - not closely related, Vestigial Structures - parts that are still there which we no longer use - wisdom teeth/whale pelvis, Embryology - studying the early development of organisms, Pharyngeal Pouches - gland that regulates calcium in neck area - becomes gills on fish, Molecular Biology - DNA sequences - strongest evidence of evolutionary relationships,

Science Chapter 6 Study Guide

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