Which phyla did you not expect to be grouped together based on their morphology? How could morphological data alone lead biologists to group animals into erroneous evolutionary relationships?
Which phyla did you not expect to be grouped together based on their morphology? How could morphological data alone lead biologists to group animals into erroneous evolutionary relationships?
Biology 2e
2nd Edition
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter28: Invertebrates
Section: Chapter Questions
Problem 11RQ: The rhynchocoel is a. circulatory system fluid-filled cavity primitive excretory system proboscis
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Concept explainers
Animal Diversity
Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.
Platyhelminthes
Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.
Question
Which phyla did you not expect to be grouped together based on their morphology? How could morphological data alone lead biologists to group animals into erroneous evolutionary relationships?
Transcribed Image Text:Echinodermata
Mollusca
Annelida
mantle and
muscular foot
Arthropoda
chitinous setae
Nematoda
water vascular system
segmented
jointed appendages
Platyhelminthes
trochophore
Cnidaria
Chordata
Porifera
notochord
blastopore forms anus
undergo ecdysis
blastopore forms the mouth
triploblastic
muscles and nerves
true tissues
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