After examining the different specimens, construct a dichotomous key to the different phyla. Construct a dichotomous key to the classes of Phylum ARTHROPODODA according to observable morphological features.     Class Chilopoda (specimen: Scolopendra (centipede) )     Class Diplopoda (specimen: Aclacodricus (millipede))     Class Insecta (specimen: Melicodes (grasshopper))     Class Crustacea (specimen: Penaeus (shrimp) & Portunus (crab) ) &     Class Arachnida (specimen:Theridion (spider))

Download a phylogenetic tree of Bilateria that includes the ten phyla of bilaterian discussed in this module. From the tree, be able to identify whether members of the phylum are coelomates (C), pseudocoelomates (P), or acoelomates (A). Use your labeled tree to answer the following questions: a) For each of the three major clades of bilaterian, what can be inferred about whether the common ancestor of the clade had a true coelom?  b) To what extent has the presence of a true coelom in animals changed over the course of evolution?

Redraw the phylogenetic tree for Cnidarians showing only the relationships between Scyphozoa, Rugosa, Tabulata, and Scleractinia. Circle the Anthozoa clade.​

which characteristics would describe Collembola? check all that apply   Abdominal appendage present No abdominal appendage Mouthparts hidden within head Mandibulate mouthparts Antennae with more than 8 segments Antennae with less than 8 segments No prolegs on the abdomen No visible evidence of wings Wings present 6 legs