Question: Did the fissile record of snakes first appear in the period when eustatic sea level is low?, Answer:No, Description of Snake: limbless, scaly, elongate reptile, Fact1: Fossils readily identifiable as snakes first appear in the fossil record during the Cretaceous period., Fact2: The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas.
Step1: Where in the fossil record do snakes first appear?, Step2: Were the eustatic sea levels in #1 low?, Wikipedia page for step 1: Snake (evolution), Wikipedia page for step 2: Cretaceous period, not_definitive_answer: False, incorrect_answer: False