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Version 1 5 20 humans have direct development a

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20.Humans have direct development, a closed circulatory system, well-developed eyes, and largebrains. Which mollusk also shares these features?
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21.A snail in your garden and an oyster are quite different in appearance. What would be evidenceto justify grouping them together?
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22.Paramecia use cilia for locomotion and for gathering organic matter. How are rotifers similar?.
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23.Why doesn't a tapeworm have a mouth on its scolex?A)The mouth is on the proglottids.B)Endoparasites do not need a mouth.C)The mouth is located at the end of the pharynx.D)Tapeworms use a radula instead of a mouth to feed.
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24.According to the modern classification scheme, which animal would be a spider's closestrelative?
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25.The phylum that includes snails, clams, oysters, and octopuses is the
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26.In mollusks, the folds of tissue that arise from the dorsal body wall and enclose a cavitysurrounding the visceral mass are called the
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27.Squids and octopuses move by means of water movement through theirA)tentacles.Version 17
B)cilia and flagella.C)modified mantle cavity.D)muscular foot.E)radula.
28.The nitrogenous waste in mollusks is removed by
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29.Trochophores, the free-swimming larvae of many mollusks, are propelled through the water by
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