BIOL 371 Lecture Notes - Lecture 29: Keratin, Incus, Parietal Eye
Document Summary
Pit organ senses infrared which is body heat. Hog-nose snake play dead and to mimic the rattle snake, to avoid predators. Push back at multiple points of contacts and the folds propel them forward- lateral undulation, for smooth surfaces. Rectilinear motion uses ventral scales and for sandy surfaces. Leathery coating and usually placed under a log or in shady areas for hiding purposes. Ovoviviparous- retain the eggs internally and bare live young. Have a 3rd eye called the pineal eye that is used as a light/dark sensor. Attack things on shore or in the water and drown they prey to kill. Build nest by piling up vegetation and show a lot of maternal care. Environmental sex determination: the amount of heat that hits the offspring determines the sex (30-33 degree they become females and higher than 33 than they become male) Archaeopteryx is believed to a bird-like dinosaurs and the link between dinosaurs and modern birds.
