Latest QuestionsAuthor "hummingbird"
Which of the following is a point of conflict between the phylogenetic analyses
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Which of the following was probably the least important factor in bringing about
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Acoelomates are characterized by A) the absence of a brain. B) the absence of me
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The distinction between sponges and other animal phyla is based mainly on the ab
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Among the characteristics unique to animals is A) gastrulation. B) multicellular
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Some researchers claim that sponge genomes have homeotic genes, but no Hox genes
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Which of these, if true, would support the claim that the ancestral cnidarians h
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The last common ancestor of all bilaterians is thought to have had four Hox gene
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Which distinction is given more emphasis by the morphological phylogeny than by
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What is true of the clade Ecdysozoa? A) It includes all animals that molt at som
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If the current molecular evidence regarding animal origins is well-substantiated
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Which of the following statements concerning animal taxonomy is (are) true? 1.
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If a multicellular animal lacks true tissues, then it can properly be included a
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The most ancient branch point in animal phylogeny is that between having A) radi
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Protostome characteristics generally include which of the following? A) a mouth
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