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Any disturbance which causes the aestivating snail to withdraw farther into its shell will invariably ruptures the epiphragm . The heart of the pulmonate may slow down from 36 beats per minute to only three or four . A - The operculates vary from the single tooth per row on the radula to forms with over 800 teeth in each row and a total tooth count of perhaps 75,000 . It is a process that is quite laborious , requiring the interpretation of antiquated and often imprecise textual locality descriptions into Cartesian coordinates such as latitude and longitude . Several years ago , a beautiful Asian snake , the red-necked keelback ( Rhabdophis subminiata ) , was commonly sold into the pet trade as harmless , until one fatal and several near-fatal bites occurred to people handling them . Government should bear at least 20 percent of the loss from a default . Unlike the front-fanged elapids and viperids , the venomous colubrids are rear-fanged snakes , which must hang on and chew when they bite to inject any venom . Grouping governmentwide data into categories similar to those areas used in the annual budget ( Analytical Perspectives ) , which presents an analysis by education , housing agencies , business and rural development , and insurance programs , would provide a better basis for evaluating agency performance and finding alternative solutions for decreasing delinquent debt . But here at the Academy 's Osher Foundation Laboratory for Molecular Systematics , Robin Lawson and I have begun to sequence venom protein genes in elapids in an effort to find out whether or not they share the viperid pattern of gene duplications and rapid exon evolution . Analysis of cost-effectiveness , preferably couched in terms of unit cost per result , would be a highly relevant measure of agency efforts . In the operculates it may drop from 53 to only two to three times per minute . Because the small young are also vulnerable to climate and enemies , it is quite usual for 5 per cent or less of eggs laid to reach adulthood . Unlike gobies , rice fish always stay in the water , suggesting that the vine snakes were catching their meals directly from the river . Atop this basic template , nature has wrought complex combinations of ridges and crests , protruding processes and corkscrew tusks to fashion the framework of different species . A closer look at our study site , in the vicinity of Bear Lake . Fortunately , the patient arrives at a hospital and is administered antivenom for rattlesnakes . First , Myanmar-the largest country in southeast Asia at over 260,000 square miles-is a visually stunning place .