The distinction between sponges and other animal phyla is based mainly on the absence versus the presence of Biology The distinction between sponges and other animal phyla is based mainly on the absence versus the presence of A) a body cavity. B) a complete digestive tract. C) a circulatory system. D) true tissues. E) mesoderm. Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+
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