Questions and Answers
What is the major difference between Parazoa and Eumetazoa?
Parazoa includes only sponges, while Eumetazoa includes animals with true tissues
Which group of animals is organized around a central axis and lacks well-developed muscles?
Radial animals
What is the probable ancestral organism of animals according to most zoologists?
Choanoflagellate
What is the significance of the Parazoa-Eumetazoa split in the animal kingdom?
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Which of the following is a characteristic of radial animals?
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What is the basis for constructing phylogenetic trees in zoology?
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Which fossil site(s) support(s) the evidence of a tremendous radiation of animals at the beginning of the Cambrian period?
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What were the ecological causes that may have sparked the Cambrian Explosion?
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What is the significance of the Cambrian Explosion?
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