Nematodes are the simplest animals to manifest a one

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an anus, called an ostium.nematodes are the simplest animals to manifest a one-way digestive tract.development of peristatsis in tapeworms allowed movement of food through the gut,independent of body movements.organisms with a coelom are most likely to have the longest and most complex guts.
ReferencesMultiple ChoiceLearning Objective:26.5 Describe theevolution of thedigestive system inanimals, asillustrated by thepassage from simpleto complex animals.Difficulty: HardSection: Evolutionand diversity ofdigestive systems
284.Award: 1.00 point
ReferencesMultiple ChoiceLearning Objective:26.5 Describe theevolution of thedigestive system inanimals, asillustrated by thepassage from simpleto complex animals.Difficulty:MediumSection: Evolutionand diversity ofdigestive systems

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