ONE WORD ANSWER =
(1)category of chemicals released by one animals that have a response in members of the same species.
(2) the group of worm like molluscs that don't have a shell.
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1) Pheromone is
the
chemical
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There are over 30 phyla dedicated to invertebrates. Major invertebrate phyla that you should know include porifera, cnidaria, platyhelminthes, nematoda, mollusca, annelida, arthropoda, and echinodermata
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