PPT-Amphibians and Reptiles

Ron Chakrabarty Mark Juhn Daniel Montgomery Andrew Tung Amphibians Family Amphibia Amphibians GeneralUnique Characteristics Moist glandular skin with no scales Feet lack claws and are often webbed. Taxonomy of Amphibians. Kingdom . Animalia. Phylum . Chordata. Subphylum Vertebrata. Class . Amphibia. Order . Urodela. . (salamanders & newts). Order . Anura. . (frogs & toads). Amphibian diversity. Anura. (. frogs, ~4000 sp.); . Caudata. (salamanders, ~450 sp.); . Gymnophiona. (caecilians, ~175 sp.). Skin. permeable. respiration. mucous glands. poison glands. biphasic . lifestyle. For each theory . Explain the mechanisms. State the evidence. Q7. If you get stuck use the . ipad. and web age below.. http://. en.wikipedia.org. /wiki/. Alvarez_hypothesis. Over view of classification. Maya, Courtney, and Jae-. L. ynn. Characteristics. Reptiles are cold-blooded, vertebrates with scales covering their skin. . They are considered as tetrapod's (with four legs or leg-like appendages) even though legs are absent in some animals, like snakes. . Chapter 34. “Never grow . a wishbone . where your backbone ought to be” . -Clementine . Paddleford. Origin of . Tetrapods. First . tetrapods. diverged 365 million years ago . (________). ________________________and shallow inland lakes with muddy bottoms likely selected for early . History of Reptiles. Reptiles arose from amphibians. Earliest fossils 359 . m.y.a. Small, four – legged vertebrates w/small teeth. Pangaea. Drier climate. Mass extinction during Paleozoic era. Diversified to fill niches left by extinct species. Fully adapted for life on land. All Amniotes – produce Amniotic Eggs. Dry, Scaly Skin. Ectothermic . More Efficient Circulatory and Respiratory Systems. Cloaca . Except for snakes, Reptiles have Paired limbs, most ending in 5 clawed toes . Adaptations to Meet Challenges of Life on Land. Challenges of Life on Land vs. Water. Adaptation to Meet Challenge . Air much less buoyant than water so must move against gravity. Limbs develop;. skeletal and muscle systems become stronger. Shore Birds:. Also known as Waders. Feed on abundance of marine life in the intertidal zone. Size varies from as small as a sparrow to larger than a chicken. Group includes oyster catchers, tattlers, curlews, godwits, turnstones, sandpipers, jacanas, surfbird, phalaropes and inland species such as woodcocks. Test 2: Amphibians and Reptiles:. Objective 1: Describe the characteristics of Modern Amphibians. Objective 2: Describe characteristics of the following orders: (. Apoda. , . Urodela. , . Anura. ). Give examples of each.. Fully adapted for life on land. All Amniotes – produce Amniotic Eggs. Dry, Scaly Skin. Ectothermic . More Efficient Circulatory and Respiratory Systems. Cloaca . Except for snakes, Reptiles have Paired limbs, most ending in 5 clawed toes . Amphibians “Double Life” Adaptations to Meet Challenges of Life on Land Challenges of Life on Land vs. Water Adaptation to Meet Challenge Air much less buoyant than water so must move against gravity Amphibians “Double Life” Adaptations to Meet Challenges of Life on Land Challenges of Life on Land vs. Water Adaptation to Meet Challenge Air much less buoyant than water so must move against gravity Amphibians and Reptiles Class Amphibia Amphibia =Double Life Frogs, toads, salamanders, and caecilians ~6000 species Skin with mucoid secretions, lack epidermal scales, feathers or hair Larvae are usually aquatic and