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The free-swimming larval stage of some turbellarians is called a/an
Q3: Nemerteans differ from flatworms in that they
Q8: Lyell and Hutton espoused the idea that
Q13: Sea cucumbers belong to the echinoderm class<br>A)Holothuroidea.<br>B)Crinoidea.<br>C)Asteroidea.<br>D)Ophiuroidea.<br>E)Concentricycloidea.
Q15: The English people found Oliver Cromwell difficult
Q23: Which of the following is NOT a
Q23: Which of the following groups of worms
Q24: The open,ciliated funnel of the metanephridium is
Q31: Unlike sea stars,in ophiuroids,the tube feet are
Q33: "Red-tides" are caused by<br>A)radiolarians.<br>B)foraminiferans.<br>C)sporozoans.<br>D)volvicines.<br>E)dinoflagellates.
Q35: Leeches become _ when searching for food.<br>A)negatively