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Unformatted text preview: Funnel Web Spiders, Atrax robustus Symptoms o Generalized muscle spasms o Salivation o Hypertension Venom greatly over stimulates muscle Venom primarily affects primates: other mammals more resistant Japanese Puffer Fish Tetrodotoxin; concentrated in gonads Blocks nervous transmission Symptoms: o Vomiting o Light headedness o Dizziness o Feelings of doom (you can imagine why) An ascending paralysis; death can occur within 6-24 hours Other marine organisms store TTX Harlequin frogs Blue ring octopus Convergent evolution Different structures independently evolved to produce same trait Signature feature of evolution Evolution a creative process; converges on the same solution for a problem...
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- Fall '08