Your colleague is studying a newly discovered organism. She is becoming increasingly convinced that the organism is an arthropod. You find that you must respectfully disagree when you note that the organism has a set of distinctly nonarthropod characteristics. The features that cause you to exclude the organism from the arthropod grouping are
A. Malpighian tubules, ommatidia, and tagmata.
B. antennae, six legs, and mandibles.
C. jointed legs, ecdysis, and an exoskeleton.
D. compound eyes, book lungs, and a hemocoel.
E. pseudocoel, closed circulatory system, and ventral heart.
Answer: E
Biology & Microbiology
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