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Study guidehol - Which animal phylum is the most diverse?...

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Which animal phylum is the most diverse? Which phylum/clade do we belong to?  Arthropoda is the most diverse. Humans belong to the primates.   How the major groups of amniotes are classified (i.e. what characteristic defines a  group)?   Amniotes have eggs that are fertilized internally.  The eggs were also laid externally.  Skull conditions are used to distinguish amniotes: Synapsid and diapsid skulls.  Synapsid skull leads to mammals diapsid skull leads to dinosaurs. Be able to name some members of the diapsids and synapsids.    What are continental climates?  Were they widespread on Pangaea?   Continental climates are characterized by wide annual temperature variation and low rainfall. Yes they were widespread on Pangaea, there was an increase in seasonality and an arid climate inland as well. What is endothermy?  What does it have to do with being active during the day or night?  What is a drawback of being endothermic?  Are mammals endothermic?  Are modern  reptiles?  Endothermy means warm blooded.  This means that animals can be active at night as  well as during the day.  They do not need the sun to heat their bodies.  Drawbacks of  endothermy include high metabolic rates and constant breathing for support, which  means more food consumption.  All mammals are endothermic.  Some modern reptiles  are classified as endothermic, apparently according to Vickers.   What are the major 2 groups of the dinos; what characteristic defines each group?  What  fundamental character (synapomorphy) defines dinos as a group?    Two major types of dinos are Saurischia (Lizard-hipped) and Omithischia (Bird-hipped).  The bipedal stance is what defines the dinosaurs (Synapomorphy).  Which group of dinos were the largest?  Are dinos (cladistically speaking) still around  today?  The Sauropods were the largest land animals ever.  Cladistically, the dinos are not  extinct.  Birds are considered dinosaurs.
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This document was uploaded on 06/09/2008.

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Study guidehol - Which animal phylum is the most diverse?...

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