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The Position Of Acoelomorph Turbellarians Among Lower Worms, Seth Tyler
The Position Of Acoelomorph Turbellarians Among Lower Worms, Seth Tyler
University of Maine Office of Research Administration: Grant Reports
The Acoelomorpha is a group of worms of comparatively simple structure, and, accordingly, some biologists consider them to represent the most basic form of all multicellular animals. Acoelomorphs digest their food with a multinucleate mass of tissue instead of in the lumen or cavity of a gut, and their nervous system is only loosely organized into concentrations that could be compared to the brain and nerve cords of other animals. Taxonomists divide the group into 17 families, largely on the basis of the structure of the reproductive organs, but have fallen short of explaining how these families relate to each …
An Investigation Of The Evolution Of Autotrophic Endosymbioses In Bivalves By Comparative Molecular Phylogenetic Analysis Of Host And Symbiont Rrna Sequences, Daniel L. Distel
An Investigation Of The Evolution Of Autotrophic Endosymbioses In Bivalves By Comparative Molecular Phylogenetic Analysis Of Host And Symbiont Rrna Sequences, Daniel L. Distel
University of Maine Office of Research Administration: Grant Reports
Symbiotic associations between animals and bacteria are extremely diverse and commonplace in nature. In fact, it is difficult to find examples of animal species whose existence is not profoundly influenced by symbiotic associations with bacteria. For example, mitochondria (the structures within human cells that generate the energy for metabolic processes) are thought to have arisen from ancient bacteria that long ago formed a symbiotic association with the ancestor of all living animals. The support provided for this project will allow investigation of a type of symbiosis commonly found in clams and worms from deep-sea hydrothermal vents (marine hot springs) that …