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Venom toxicities are generally measured in terms of mouse LD-50s , which is the dose required to kill one-half of a test group of mice which have been given the venom . The first legs have modified setae on the inner surface that may aid in holding the prey . Action should be taken to clear the difference within 2 months of occurrence . The agency must advise the RFC to make a correction if the difference is caused by an RFC error . Your application / resume must contain the information identified below ( in addition to specific information requested in the vacancy announcement ) . The frequent gene duplications provide additional venom proteins , expanding the snake 's arsenal and increasing the chance that the prey will be killed . For example , many venom enzymes have a digestive function , breaking down various molecules in the prey such as lipids , nucleic acids , and proteins . After the 1906 earthquake and fire , which destroyed most of the original collections of birds and mammals , the department was reborn with the resurrection of the new Academy of Sciences . The extremely long lateral spinnerets spin sheets of silk used in prey capture : the spider circles rapidly around the prey tying it down with silk . But then , of course , the prey re-evolves resistance , and so on . Specifically , difficulty with inhibition ( technically termed " response inhibition " ) has been proposed as the primary problem in ADHD , as is evidenced by the difference between the performances of children with and without ADHD on a test called a " stop task .