Nov 24 - Animals Lecture #20 - Reptiles

Constrictor snakes dont care and just eat it live

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Constrictor snakes don’t care and just eat it live Only they would attack large preys such as alligators Their head structure allows them to open their mouth wide Additional joint at bottom lower joint can open 180 degrees Myth #2 : Snakes are ferocious o Bunnies are o Only ~20% of snake’s species are harmful… but some can bite you after you kill them! o Depends on where you like Australia is 80% If snake is dead – it can still bite due to a nervous reflex Diapsdia: Lizard (Lacertilia) More diverse than snakes Agile and fast quadrupeds, parietal eye, eyelids, automize tail Geckoes- nocturnal, toe pads, sell insurance? Iguanas – some species marine, feed underwater Chameleons – slow, cryptic, yet predatory o Cryptic but NOT that myticall cryptic Snake-like lizards o Snake-like body form o To tell them apart:*********88 Have eyelids (can blink) Lateral groove that runs a long side their body o Same niche as snakes Amphisbaenids – also snake like lizards
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o Worm lizards o Structural convergence o Some have front legs o One lung o Rudimentary eyes o They move like wave length fashion – like worms hence worm lizards Order Crocodylia Crocodiles and Alligators o Predatory “amphibious” o Swift and agreesive Oviparous – mother unearths babies once they hatch o Leaves them underground Laterally compressed tail o Used for swimming o Sensory openings above o Secondary palate (+valves) Only seen in mammals beside crocodilians Breathe when its full of water or food or anything Doesn’t have to let go prey to breathe How do you tell them apart? o Aggression Crocodile are more larger and likely more attack o Vocalization Crocodile or alligator?? make certain sounds such as mating sounds Temperature Effect on Embryo Development o Turtles LOW T – males HIGH T - female o Crocodiles LOW T – Females HIGH t – males o Mechanism that makes this possible o Temperature that affects sex Evolutionary Success of reptiles
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  • Fall '08
  • Membranes, RNA, Water conservation strategies, Better body support, exclusively terrestrial vertebrates, Snake-like lizards, snakes- binocular vision

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