Monotrems And Marsupials

Phylogenetically isolated from other mammals monotremes-others diverged 190 mya marsupials-placentals diverged 100 mya unmatchable reproductive patterns monotremes egg laying marsupials exceedingly altricial young, simple placenta I. Monotremata(ORDER) parking area names platypus and echidna Families Tachiglossidae, Ornithorhynchidae # species 3 scattering Australia, Tasmania, New Guinea (echidna) 1. habitual characteristics of the order 1. Morphologically unique 2. Have umteen reptilian characteristics 3. Birdlike skull with elongated beak 4. No teeth - Chew nourishment with the spittle and bony plateful at roof of oral cavity (echidna) or horny gums (platypus) 5. pectoral muscle girdle splayed as in reptiles 6. Pelvic girdle mammal-like 7. Epipubic grind away that come up from the articulatio coxae along the ventral bounds up 2. Reproduction 1. Lay eggs 2. cut through them like birds 3. Have mammary glands and dispatch milk 4. No nipples 5. draw is secreted onto the abdominal fur (platypus) or into a impermanent bag and licked off the trim (echidna) 6. immense periods of maternal care 7. 1 offspring/year 3. Echidna(CLASS) 1. Morphology 1. Round, elaborate body 2. Short, summary spines covering body 3.

Tube-like rostrum covered with leathery skin 4. extensive tongue coated with mucous 5. bring back limbs (short, powerful, claws) 6. Small eyes 7. Females have a temporary pouch for carrying eggs and babies; structure may be back up by epipubic bones 2. Ecology and behavior 1. Solitary 2. Crepuscular 3. lie with in burrows 4. slimy seeing but great sentience of smell 5. Avoid predators by 1) Digging down...If you inadequacy to get a beneficial essay, order it on our website: Ordercustompaper.com

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