introduction on minor pyla
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Most of these phyla comprise inconspicuous and little known animals, which appeared before the two main streams of evolution diverged. They are often grouped together as the 'minor' phyla, presumably because their members are generally too small to be seen with the naked, human eye.
The minor protostome coelomates include six phyla: Sipunculoidea, Echiuroidea, Priapuloidea, Tardigrada, Pentastomida, and Pogonophora. The lophophorates are a group of four phyla (Phoronida, Brachiopoda, Entoprocta, and Bryozoa) which all share the same type of food collecting organ, the lophophore.
Answer:
Most of these phyla comprise inconspicuous and little known animals, which appeared before the two main streams of evolution diverged. They are often grouped together as the ‘minor’ phyla, presumably because their members are generally too small to be seen with the naked, human eye. These animals are rarely seen as they usually live in secluded aquatic or terrestrial microhabitats or as parasites, hidden away in other animals or plants. In spite of their inconspicuous habits, these animals are both numerous and important — as members of food chains or as parasites of economic, veterinary or medical importance.
Most of these phyla comprise inconspicuous and little known animals, which appeared before the two main streams of evolution diverged. They are often grouped together as the ‘minor’ phyla, presumably because their members are generally too small to be seen with the naked, human eye. These animals are rarely seen as they usually live in secluded aquatic or terrestrial microhabitats or as parasites, hidden away in other animals or plants. In spite of their inconspicuous habits, these animals are both numerous and important — as members of food chains or as parasites of economic, veterinary or medical importance.The features used to understand how these animals are related to each other and to other invertebrate phyla include the formation of the body cavity and the nature of their larval forms.
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