This animal’s young develop vestigial teeth that are later lost in adults, who instead use heavily keratinized pads to grind food. While hunting, this animal closes its eyes, (10[1])ears, and nose, (10[1]-5[1])and shakes (-5[2])its snout (10[1])back (10[1])and (10[1])forth (-5[1])to (10[1])sense (-5[1])prey (-5[2])using (-5[1])its 40,000 (10[2]-5[1])electroreceptors. (10[8]-5[10])This animal’s (-5[2])crural glands (10[1])produce (10[2]-5[1])venom (10[4])that (10[1])is (10[1])injected (10[3])by (10[1])spurs (10[7]-5[1])on its (10[2])hind (10[7])limbs. (10[23]-5[1])This (10[2])animal practices (10[3])knuckle-walking to protect the webbing (-5[1])on its feet. (10[4])This sole (10[1])member (10[1])of the genus (10[2]-5[1])Ornithorhynchus (10[2])(“OR-nith-oh-RING-kiss”) lacks teats and delivers milk (10[1])through its pores, (10[1])like the (10[1])echidna, (10[2])its monotreme (10[1])relative. (10[1])For 10 points, name this semiaquatic, egg-laying (10[2]0[1])mammal (10[1])often (10[2])described as “duck-billed.” (10[2])■END■ (10[10])