Chordates part 3 - (c) Birds & mammals are endotherms...

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Chordates part 3 Page 1 of 4 Summary of readings for Introduction to animal diversity, invertebrates & chordates Animal diversity Readings: Chapter 18: 370-371, Chapter 21: 445-447, & Chapter 32 Invertebrates Readings: Chapter 33 Self quiz questions 1 – 5 Chordates: Chapter 34: 698 – 727 Self quiz questions 1 – 6 Evolution connection question 8 ____________________________________________________________________________ Some important terminology 1. Sources of body heat 1.1 Ectoterms (a) Obtain their body heat from external sources (b) There are 4 main types of heat exchange (i) Radiation (ii) Conduction (iii) Convection (iv) Evaporation (c) The body temperature may be quite stable without obtaining or losing heat (d) Most fish, amphibians, turtles, snakes, lizards, & crocodiles 1.2 Endotherms (a) They generate their body heat by metabolism
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Chordates part 3 Page 2 of 4 (b) They have a constant core body temperature
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Unformatted text preview: (c) Birds & mammals are endotherms Synapsids include the living mammals 1. Derived characteristics of mammals (a) Associated with endothermy (b) Improved hearing (i) Pinna (ii) Cochlea (iii) Two “new” ear ossicles & new jaw joint (Fig. 34.31) Chordates part 3 Page 3 of 4 (c) Increased diversity of teeth 2. Extinct synapsids (a) Three main groups (b) Increased locomotor ability (c) Increased rate of feeding 3. Living mammals (a) Monotremes (b) Marsupials (c) Eutherians 3. Primates (a) Derived characteristics Chordates part 3 Page 4 of 4 (b) Living primates - Three main groups (see Fig. 34.37) (i) Lemurs, lories & pottos (ii) Tarsiers (iii) Anthropoids Old & New World monkeys Apes Humans 4. Convergent evolution of marsupials & eutherians (a) What is convergent evolution? 4. Convergent evolution in marsupials & eutherians (a) What is convergent evolution?...
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This note was uploaded on 01/15/2011 for the course BIOL 190B taught by Professor Dr.davidcreasey during the Spring '10 term at University of Victoria.

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Chordates part 3 - (c) Birds & mammals are endotherms...

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