Class reptilia birds owls sparrows penguins eagles

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Class reptilia birds: Owls, sparrows, penguins, eagles
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Archeopteryx- bird like dinosaurs Forelimbs modified to wings. Flight adaptations Had teeth feathers , keratin protein, hollow shafts Honeycombed bone structure, strong and light Airfoil shaped wings Class mammalia Tetrapods- hair mammary glands. First mammals- 200 mya with dinosaurs They were small and nocturnal, insect eaters- to avoid the big dinos Order monotremata- egg laying mammals Ex echidnas, platypus Found only in australia and new guinea Order marsupialia ex - possums, kangross, koolas Brief gestation in mother's uterus, development continues in marsupium- mother's pouch. Eutherians (plarental) humans , dogs,whales,rodents,bats Bear fully developed, live young Supported by placenta Order primate Lemurs, monkeys, apes (humans) Grasping hand and feet Forward looking eyes, good vision Relativly large brains, short jaw. Primate phylogeny New world monkeys- arboreal have tails Old world monkeys- arboreal and gorund deweling apes lack tails
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Human ancestry Homo spaiens species- 200,000 years old. Characteristics compared to ancestros. Generally taller, more upright, bipedal, relativley larger brain, expanded tool use. Form and function ( animal) Form and function based on trail-and- error Genetic variatons “tested” by environment Includes physical laws, rates of diffusion, heat exchange etc. Rate of change is proportional to surface area. Amount needed to exchange (nutrients, wastes, fig 40.30)
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  • Fall '19
  • phloem, Phylum

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