Skill 4 B a Describe data from a table or graph including identifying specific data points 200 180 160 140 120 100 80 60 40 20 0 Evidence Rhynchonellides Atrypides Pentamerides Triplesioids Strophomenoids Plectambonitoids Dalmanellidines 489Ma Orthidines Protorthides Clitambonitides Billingselloids 1a 1b 1c 1d 2a 2b 20 3a 3b 4a 4b 4c 5a 5b 5c Tremadoo Arenig Lanvirn Caradoc Mohawkian Ibexian TREMADOCIAN LOWER ORDOVICIAN FLOIAN Whiterockian DPN DARRIWILIAN M ORDOVICIAN 472 5d 6a 6b 6c Ashaill Cincinnatian MAKATIAN SANDBIAN UPPER ORDOVICIAN 460 5 C Guiding Question What happened to the trilobites Why are they extinct Claim Reasoning 443