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Therefore , predation is greater on young than on mature snails . Triassic Period , 200 million years ago , all the land masses were united into a single continent called Pangea . Commissioner for FMS ' Debt Management Services , in conjunction with major credit agencies and OMB , to revise the framework and data requirements for agency reporting on debt collection to ensure that reports to the Congress do the following . The snail then has choices : it may repair it , replace it with a new one , add an additional one , or go into a period of activity . Over the course of a school year , students build and deploy their settling plates at local marinas , collect and analyze data on what organism become established on the plates , and compile their results into a final project . This conversion of a vague locality description into a single subjective point creates the problem of false precision , often to a scientifically unacceptable degree . The act calls for these amounts to be available to reimburse agencies for certain debt collection and related expenses . The limits of this family of running or burrowing spiders are still unclear , and most African genera attributed to the Miturgidae may ultimately be moved elsewhere ( Griswold 1993 ) . Elapids have not yet been examined for these phenomena . Large prey receive more venom than smaller prey , and often an attacking snake considers it unnecessary to inject venom into a potential predator ( such as a human ) that it is trying to repel , rather than kill .