The organisms underneath, usually plants, can be identified and counted. nov.] Quickly memorize the terms, phrases and much more. Some organisms live in neighbouring populations.                          "neomura" Cavalier-Smith 1987 Naming and identifying organisms began with the Greeks and Romans. They use less energy as they hunt, so they have ample energy to strike when they find their prey.                                      Specially adapted to life in midwater are the eagle ray and manta ray. A(n) _____________ is an organism that can create organic chemical compounds from inorganic compounds and an external energy source. Cram.com makes it easy to get the grade you want! 1996; May 2003), mitochondrial DNA (mtDNA) restriction patterns (Lansman et al. Pectoral fins have become “wings” that stretch forward over the gills and are fused The marine mammals in order Sirenia include: Human activities that have endangered or may endanger marine mammals include: the study of how organisms relate to each other and their environments. Sea lilies and feather stars are in class _____, which is characterized by _____ and _____. those regions have more abundant nutrients. A. Taxonomy. Microorganisms are very diverse. the superorder Euselachii (Nelson 1994), which includes. IWC members don't have to abide by its rulings, Whaling continues despite the IWC moratorium because. Subdivision Batoidea rays Hypotremata Superorder Batidoidimorpha of Nelson 1984 Order Rajiformes of Nelson 1994. 1. sharks (superorder Selachimorpha - 340 species) 2. skates and rays (superorder Batidoidimorpha - 425 species) some give birth to live young, some are filter feeders. based on how scientists interpret the fossil record. We cannot easily classify these organisms as they do not follow the species definition. Diatoms produce about __________ of photosynthetic biomass. are readily formed under certain conditions by natural processes.              have two shells, lack a "head", and do not have a radula.                                        A(n) _______ plant lives partially in and out of the water. Mundus Plinius - physical world Phylum Chordata Bateson, 1885 - chordates Ray anatomy is well suited to life on sandy bottoms or midwater. How do most sharks and rays reproduce? Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics About _____ % of the protein in the human diet comes from the ocean, the continental shelf and offshore regions with upwelling, these are high bioproductivity regions. They have cell wall with chitin and heterotrophic in nutrition. Sea cucumbers are in class _____, which is characterized by _____ and _____.          Conditions that challenge organisms in littoral ecosystems include: 1. reducing sedimentation caused by coastal erosion.                                                    Specially adapted to life in midwater are the eagle ray and manta ray. Squid differ from cuttlefish in that they're streamlined for open water living and have two tentacles that are longer than the others for seizing prey. nov.] Learn faster with spaced repetition. Mollusks in class Cephalopoda include_____ The _____ is thought to be the most intelligent invertebrate. see Division Neoselachii                                                          Organisms in phylum Echinodermata are distinguished by characteristics including: Members of phylum Echidermata are similar to chordates because, Crinoidea, upward-facing mouth, ling feather-like arms. 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