What are the major differences between the phyla Platyhelminthes and Aschelminthes?
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The Aschelminthes (sometimes Aeschelminthes), are closely related to the platyhelminthes and are an obsolete phylum of pseudocoelomate and other similar animals, including as classes the Nematoda, Rotifera, Gastrotricha, Kinorhyncha, and Nematomorpha, and sometimes the Priapulida and Entoprocta. Many of these groups are no longer considered closely related and have been promoted to phyla in their own right. The name is now generally only used as an informal term.\n\nThe phylum Platyhelminthes represents all flatworms in the kingdom Animalia. Flatworms are relatively primitive animals that represent an early lineage in the kingdom. Unlike the even more primitive phylum cnidaria, all flatworms of the phylum Platyhelminthes are bilaterally symmetrical, having an anterior, posterior, dorsal, and ventral end and two seemingly identical lateral surfaces. However, flatworms are the only type of bilaterally symmetrical animal that lacks any type of body cavity, a fluid filled space between the digestive tract and the body wall. In the flatworms, this area is filled with tissue. Flatworms have primitive brains, comprised of clusters of nervous tissue. Two long nerve cords run the length of the body, and they branch to form small nerves running throughout the body. Another hallmark of flatworms is a lack of a complete digestive tract. Flatworms take in food and excrete waste from one single hole. The opening in the gastrula never fully evolves in flatworms to make a tract that travels from one hole in the anterior end to another hole in the posterior end, which would make the tract complete. There are four classes that make up the phylum Platyhelminthes, each with unique structures and living styles.
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Can't see the whole answer, but #1 looks right so far.\n\nMnemonic below:\nKing Phillip Came Over For Good Spaghetti=\nK P C O F G S=\nKingdom Phylum Class Order Family Genus Species
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Actually, amarsupials are mammals. They are a sub group just as is the other group that includes the platapus and echidna (can't remember the name of this group).\n\nThe difference is that the young is succled in a pouch. \n\nThey are born alive, not in egg, they are warm blooded, as all mammals do/are.
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The major difference is that protist are single celled eucaryotic (have membrane bound organelles) whereas Monera are procaryotic (lack membrane bound organelles).
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Here is a great website for that sort of research. It has a taxonomic chart with hyperlinks to information, pictures, sounds, and specimens. There are more than a dozen phylums of 'worms' represented with many photos to help with identification. \n\nhttp://animaldiversity.ummz.umich.edu/site/accounts/classification/Animalia.html
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From an ecological-evolutionary viewpoint, a parasite is a "perfected predator", a predator that has evolved to extract resources from its host without killing it (and for some ecologists, grazing herbivores such as cows and gazelles are also parasites). \nParasites are usually much smaller than their hosts, and their particular characteristics depend on the type of parasite they are. For instance, endoparasites are much more modified and many have lost sensory or even digestive systems in favor of developing larger reproductive organs and producing lots of descendants. Ectoparasites are usually less modified with respect to their free-living relatives, but have structures and behaviors related to finding the host and remaining attached to it. \nObligate parasites are also more specialized than facultative (optional) parasites, and some species are specific parasites of a single host, while others are capable of parasitizing several species. All these different strategies involve diverse modifications, acquisitions and adaptations.\nEventually, parasites may become symbionts, by becoming gradually less damaging to their hosts and more specifically related with them.\nSee the first link for evolution of parasitism:
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Birds, Definitely. birds, being warm blooded, are much closer to mammals than amphibians. Amphibians only show the faintest glimmer of an R-Complex, known in your brain as a cerebellum - the reptilian part of the brain. Birds, by contrast, have a highly developed R-complex and even show the beginnings of a cerebrum (the big lumpy part of your brain that handles all that rational though stuff). Can you imagine a frog or a salamander uttering, "Polly wants a cracker?" >:)
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Their nose, mainly.\n\nIn terms of physical differences the easiest way to tell the difference between the two is that a crocodile has a very long, narrow, V-shaped snout, while the alligator's snout is wider and U-shaped.
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How can you even compare the two?  They're in totally different generas!
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Hemichordata is a phylum of worm-shaped marine deuterostome animals, generally considered the sister group of our own, the chordates. They date back to the Lower or Middle Cambrian and include an important class of fossils called graptolites, most of which became extinct in the Carboniferous. They seem to have a primitive form of notochord, but this is most likely the result of convergent evolution. A hollow neural tube exists among some species (at least in early life), probably a primitive trait they share with the common ancestor of chordata and the rest of the deuterostomes.\n\nHemichordata are divided into two classes: the Enteropneusta, commonly called acorn worms, and the Pterobranchia, which may include the graptolites. A third class, Planctosphaeroidea, is proposed based on a single species known only from larvae. The phylum contains about 100 living species. The exact taxonomic position of hemichordata and whether the group is monophyletic is currently under debate.
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I can think of a few:\n\nFungi are actually more closely related to animals. They get their food from living matter.\nHowever, they are different from animals because:\n\nThey absorb their food instead of ingesting it.\n\nThey have cell walls.\n\nThey are stationary, like plants.\n\nThey are different from plants because:\n\nThey are heterotrophs.\n\nThey lack roots.
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Sponges are Porifera; hydra are Cniderians.\n\nPorifera have body pores (ostia), canals and chambers that serve for passage of water. They also have choanocytes (collar cells) specialized cells that create water currents, as they are filter feeders.  \n\nCnidarians have stinging cells organelles called nematocytes or cnidocytes. They also have a nerve net with symmettrical and asymmetrical synapses.  They have a muscular system.
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look here:\n\nhttp://www.biologie.uni-hamburg.de/b-online/e18/18c.htm
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Normally, it is considered to be Invertebrates the following taxa, though they do not include Hemichordata and Cephalochordata (Which are chordates but not vertebrates):\n\n- Protozoa: unicellular organisms\n- Porifera: sponges\n- Placozoa\n- Orthonectida: (Prev. Mesozoa)\n- Dicyemida: (Prev. Mesozoa)\n- Cnidaria: jellyfish\n- Ctenophora\n- Platyhelmintes: flatworms\n- Nemertea (= Rhynchocoela)\n- Gnathostomulida\n- Rotifera\n- Acanthocephala\n- Micrognathozoa\n- Gastrotrichia\n- Nematoda\n- Nematomorpha\n- Priapula\n- Kinorhyncha (= Echinodera)\n- Loricifera\n- Arthropoda: insects, spiders, crustacea, etc.\n- Annelida\n- Pogonophora\n- Vestimentifera\n- Echiura\n- Sipuncula\n- Mollusca\n- Phorona\n- Ectoprocta (=Bryozoa)\n- Brachiopoda\n- Entoprocta\n- Cycliophora\n- Echinodermata: sea stars, etc.\n\nYou can also include to de list Hemichordata and Cephalochordata.
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Porcine Ascarias\n\n \n\n\n\nAscaris suum, commonly known as roundworm, is the largest gastrointestinal parasite of the pig. From a respiratory disease standpoint, roundworms are important because part of their life cycle involves migration of the immature larvae through the lungs of the pig. This larval migration can result in large areas of the lung parenchymal tissue being damaged, with subsequent development of aerobic or anaerobic bacterial infections. As larvae migrate through the lungs, they destroy alveoli; they may cause a local eosinophilic infiltration that sometimes manifests in allergic reactions; and they cause a non-productive cough referred to as "thumps" or "thumping," also known as verminous pneumonia. \n\nBacterial super-infections may also occur, resulting in edema and emphysema, along with a tremendous cellular reaction. Mycoplasmal pneumonia is also not an uncommon sequel to a severe case of ascariasis.
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two distinct forms have to be different species... don't really get what you're asking but hope that helps...
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They are both. There are Good ones and Bad ones. Some parasites such as leeches simply suck your blood out and do nothing for you. Other parasites have what is known as "Symbiotic Relationships" where they help one another. For example, there are birds that nest on alligators. The alligators give the bird safe haven from dangerous predators. The Birds in turn feed on particles of food left in the alligators mouth so they dont suffer from dental problems. They help one another out.