Open Question
One trait that is shared by humans and protostomes is __________.
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Ch. 31 - Protostome Animals
Chapter 30, Problem 1
Rank the three most diverse phyla of protostome animals.
a. Arthropoda > Mollusca > Nematoda
b. Mollusca > Arthropoda > Nematoda
c. Arthropoda > Nematoda > Mollusca
Verified step by step guidance1
Understand the term 'diverse' in the context of biological classification, which refers to the variety and abundance of species within each phylum.
Review the characteristics of the phylum Arthropoda, which includes insects, arachnids, myriapods, and crustaceans, known for their jointed limbs and exoskeleton.
Examine the phylum Mollusca, which encompasses a range of species from snails and clams to octopuses, characterized by a soft body and often a hard shell.
Look into the phylum Nematoda, or roundworms, which are mostly microscopic and ubiquitous in diverse habitats but less varied in form compared to Arthropoda and Mollusca.
Compare the species richness and variety of body forms among these phyla to determine the ranking of diversity from greatest to least.
Related Practice
Textbook Question
Which protostome phyla successfully made the transition from water to land? Select True or False for each phylum. T/F Mollusca T/F Arthropoda T/F Annelida T/F Nematoda
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Textbook Question
Which of these characteristics does not apply to cnidarians? a. are diploblastic b. possess a gastrovascular cavity with one opening c. undergo metamorphosis d. have a central nervous system
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