Multiple Choice
Which Australian animal is well-known for its ability to change its appearance to blend into its surroundings?
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1. Introduction to Biology
Introduction to Taxonomy
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Which of the following correctly matches a phylum or class with its characteristic?
A
Arthropoda — lack a body cavity (acoelomate)
B
Mollusca — have jointed appendages
C
Chordata — have an exoskeleton made of chitin
D
Cnidaria — possess stinging cells called nematocysts
Verified step by step guidance1
Step 1: Begin by understanding the characteristics of each phylum or class mentioned in the problem. Review the defining traits of Arthropoda, Mollusca, Chordata, and Cnidaria.
Step 2: Analyze the first option: 'Arthropoda — lack a body cavity (acoelomate)'. Arthropods are not acoelomates; they are coelomates, meaning they have a true body cavity. This option is incorrect.
Step 3: Evaluate the second option: 'Mollusca — have jointed appendages'. Mollusks do not have jointed appendages; this is a characteristic of Arthropods. This option is also incorrect.
Step 4: Examine the third option: 'Chordata — have an exoskeleton made of chitin'. Chordates do not have an exoskeleton made of chitin; this is a feature of Arthropods. This option is incorrect as well.
Step 5: Assess the fourth option: 'Cnidaria — possess stinging cells called nematocysts'. Cnidarians are known for their specialized stinging cells, called nematocysts, which they use for defense and capturing prey. This option is correct.
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