conclusions can be drawn about changes in organisms over time by determining the age of fossils of those organisms
geological_age is not geological_time_period. evolution has not effect_of_creating_new_species dinosaurs is ancient_reptiles. dinosaurs is not ancient_reptiles. geological_age is geological_time_period. multicellular_organism_reproduction_event is not organism_reproduction_event. multicellular_organism_reproduction_event is organism_reproduction_event. vertebrate is multicellular_organism. metabolism_multicellular_organism is metabolism_in_organism. evolution has effect_of_creating_new_species