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Getting to the bottom of anal evolution
The digestive tract is an essential organ system that allows animals to efficiently digest food and take up nutrients to maintain growth and sustain the body. While some animal groups possess a sack-like gut, others possess ...
Evolution and development of the adelphophagic, intracapsular Schmidt's larva of the nemertean Lineus ruber
(BioMed Central, 2015-09-28)
Background: The life cycle of many animals includes a larval stage, which has diversified into an astonishing variety of ecological strategies. The Nemertea is a group of spiralians that exhibits a broad diversity of larval ...