Lambei rom bio1130 organismal biology 17 universit

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Unformatted text preview: BIO1130 Organismal Biology 17 Université d’Ottawa / University of Ottawa Extinct diapsids 2:49 PM pterosaurs are actually quadripeds. fore limbs on ground webbing linked to hind rarely being able to be lifted of groud for flight must pitch themselves off cliffs Video 6:00 Pterosaurs BIO1130 Organismal Biology Université d’Ottawa / University of Ottawa 18 2:49 PM BIO1130 Organismal Biology Page 6 Mesozoic snakes are survivors from end of reptilian loss because they were burrowers living in burrows- they lost their legs - animanl can no olonger manipulate its imbs to obtain food so it uses venom or constriction to be able to swallow food, their food is swallowed whole Extant diapsids Snakes - venom BIO1130 Organismal Biology Université d’Ottawa / University of Ottawa 19 2:49 PM Extant diapsids Snake’s jaw BIO1130 Organismal Biology Université d’Ottawa / University of Ottawa 20 2:49 PM Extant diapsids crocodilians still around with crushing force jws teeth are all the same able to crush something ot the point of breaking them into pieces homodont dentition Crocodiles crushing jaws BIO1130 Organismal Biology Université d’Ottawa / University of Ottawa 21 2:49 PM BIO1130 Organismal Biology Page 7 Mesozoic little reptiles with heating fans with single opening in litle synapsyds we start to see warm blooded animals Synapsid reptiles BIO1130 Organismal Biology 22 Université d’Ottawa / University of Ottawa 2:49 PM successful because warm-blooded animals are able to run around when the night is cool because they are nocturnal they use sensory glands on skin to sense their surroundings homodont- teeth for different functions living in burrows. Reptiles - Therapsids Warm-blooded Noturnal Glandular skin Specialized teeth and chewed their food BIO1130 Organismal Biology 23 Université d’Ottawa / University of Ottawa 2:49 PM Anther Mature sporophyte Seedling Ovary Seed Seed coat Pollen sac Ovule Embryo (2n) Endosperm (3n) Double fertilization Pollen tube Meiosis Pollen tube Sperm ( n) Male gametophyte Production of microspores Production of megaspores Pollen Figure 25.33 Angiosperm life cycle Endosperm c...
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This note was uploaded on 01/14/2014 for the course BIO 1130 taught by Professor Fenwick during the Fall '08 term at University of Ottawa.

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