Biology The Essentials
Quiz 17: Evolution and Diversity of Animals
You Have Discovered a New Worm-Like Animal
You have discovered a new worm-like animal.You are convinced it is not a nematode because it A) has a complete digestive tract. B) is unsegmented. C) has bilateral symmetry. D) has a coelom. E) has tapered ends.
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Spiders and scorpions belong to the phylum A) Cnidaria. B) Echinodermata. C) Annelida. D) Mollusca. E) Arthropoda.
What are the three major body regions of many arthropods? A) head, thorax, and abdomen B) head, abdomen, and legs C) head, thorax, and legs D) head, gastrovascular cavity, and thorax E) head, gills, and legs
The most successful phylum with regards to diversity and numbers is A) Mollusca. B) Nematoda. C) Platyhelminthes. D) Arthropoda. E) Echinodermata.
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