sentences: conclusions can be drawn about changes in organisms over time by determining the age of fossils of those organisms
docs: vertebrate is multicellular_organism. multicellular_organism is living_organism. evolution has effect_of_creating_new_species multicellular_organism_reproduction_event is organism_reproduction_event. dinosaurs is ancient_reptiles. aging has effect_of_reducing_memory_function sporophyte is multicellular_organism. geological_era is geological_time_period. geological_age is geological_time_period. metabolism_multicellular_organism is metabolism_in_organism.