Echinoid revision test 0.0 / 5 ? GeologyEchinoid morphologyA2/A-levelAll boards Created by: naomiCreated on: 05-01-14 15:21 How many lines of symmetry are on a regular echinoid? 5 1 of 25 What is the function of the spines? Protection 2 of 25 Where is the plastron on an irregular echinoid? posterior interambulacra, bottom centre 3 of 25 Where to the tube feet extend through the test? pore pairs in the ambulacral plates 4 of 25 What are the functions of the tube feet? Movement, respiration, sucking 5 of 25 Name the mode of life of an irregular echinoid Infaunal 6 of 25 Name the mode of life of a regular echinoid Epifaunal 7 of 25 Which is bigger, the ambulacral plate or the interambulacral plate? Interambulacral 8 of 25 Name the type of symmetry for a regular echinoid? 5 fold symmetry 9 of 25 Where are the spines attached? to the interambulacral plates and tubercles 10 of 25 Where is the anus on an irregular echinoid? on the bottom, outside of the apical system 11 of 25 What is the anterior groove? groove on top of irregular echinoid - leads food to the mouth 12 of 25 How to regular echinoids move? spines attached to interambs plates at spine boss by muscles - any direction 13 of 25 How do irregular echinoids move? rowing action of the flattened spines of the plastron 14 of 25 What sape is the test on an irregular echinoid? heart shaped, flat 15 of 25 Name the type of symmetry for an irregular echinoid bilateral symmetry 16 of 25 How do irregular echinoids feed? filter feeding 17 of 25 Where is the mouth on an irregular echinoid? bottom of the echinoid in the centre 18 of 25 Where is the peristome? around the mouth 19 of 25 What are tubercles? where free moving spines are attached 20 of 25 How many ambulacra are there on a regular echinoid? 5 21 of 25 When did echinoids become extinct? they didn't! 22 of 25 Where is the apical system? around the periproct on the top 23 of 25 What is a labrum used for? helps direct food to the mouth 24 of 25 Are echinoids invertebrates or vertebrates? Invertebrates 25 of 25
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