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Ch. 32-42

Ch. 32

QuestionAnswer
Among the characteristics unique to animals is gastrulation
The distinction between sponges and other animals phyla is based mainly on the absence versus the presence of true tissues
Acoelomates are characterized by a solid body without a cavity surrounding internal organs
Which of the following was probably the LEAST important factor in bringing about the Cambrian explosion? the movement of animals onto land
A land snail, a clam, and an octopus all share a mantle
The water vascular system of echinoderms functions in locomotion and feeding
Which of the following combinations of phylum and description is incorrect? a
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