Use the Following Information When Answering the Corresponding Question(s)

question 26

Multiple Choice

Use the following information when answering the corresponding question(s) .
"Marine cone snails from the genus Conus are estimated to consist of up to 700 species.These predatory molluscs have devised an efficient venom apparatus that allows them to successfully capture polychaete worms,other molluscs or in some cases fish as their primary food sources.… conotoxins from Australian species of Conus … have the capacity to inhibit specifically the nicotinic acetylcholine receptors in higher animals." (B.G.Livett,K.R.Gayler,and Z.Khalil.2004.Drugs from the sea: Conopeptides as potential therapeutics.Current Medicinal Chemistry 11:1715-23. )
-Refer to the paragraph on the venom of marine core snails.What is the adaptive value of this toxin?

• A)It would cause muscle spasms in the prey.
• B)It would result in paralysis of the skeletal muscle of the prey.
• C)It would stimulate digestive tract smooth muscle to cause nausea and vomiting of the prey.
• D)Either it would result in paralysis of the skeletal muscle or it would stimulate digestive tract smooth muscle to cause nausea and vomiting;or it would result in both paralysis of the skeletal muscle and stimulation of the digestive tract smooth muscles to cause nausea and vomiting.

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