Daphnia magna Essays

Daphnia magna Essays Daphnia magna Paper Daphnia magna Paper This chapter provides an overview of the biology of waterless of the genus Daphnia. It describes basic aspects of Individual physiology and nutrition, Including some remarks about Immunity. It summarizes the typical life cycle and development of Daphnia. The modes of reproduction and the induction of resting egg production in cyclic and obligate parthenogenesis forms are discussed. Finally, population biological aspects, such as behavioral ecology, habitat preferences, population genetics, and population dynamics, are introduced. Go to: Introduction The following introduction summarizes the key aspects of the natural history of the genus Daphnia. It is far from exhaustive. Because much of the biology has been studied over the past 250 years and is considered to be common knowledge, I give no references to specific studies In most cases. The Interested reader may consult Fryer (1991), Steer (Bibb Lambert and Simmer (1 999), and Peters and De Bernard (1987), from which much of the information was taken. A search on the Internet using the term Daphnia or Clamored will also bring up a large body of information. Of particular interest is the Clamored Web page of the university of Gullah in Canada. The reader familiar with Daphnia may skip this chapter and move on to Chapter 3. Daphnia are platonic crustaceans that belong to the Payload (sometimes called Bronchiolar), which are characterized by flattened leaf-like legs used to produce a water current for the filtering apparatus. Within the bronchioles, Daphnia belong to the Clamored, whose bodies are enclosed by an unqualified shell (Figures 2. 1 and 2. 2), known as the carapace. It has a double wall, between which hemolytic flows and which Is part of the body cavity. The carapace Is largely made of chitin, a polysaccharide. Clamored have up to 10 pairs of appendages, which are (from front to back): untangles, antennae (the second antennae, used for swimming): maxillae: and mandibles; followed by 5 (as in Daphnia) or 6 limbs on the trunk. The limbs form an apparatus for feeding and respiration. At the end of the abdomen is a pair of claws. The body length of Clamored ranges from less than 0. 5 mm to more than 6 mm. Males are distinguished from females by their smaller size, larger untangles, modeled post-abdomen, and first legs, which are armed with a hook used in clasping. It describes basic aspects of individual physiology and nutrition, including some remarks about immunity. It summarizes the typical life cycle and development of references to specific studies in most cases. The interested reader may consult Fryer (1991), Steer (1993), Lambert and Simmer (1999), and Peters and De information. Of particular interest is the Clamored Web page of the University of and which is part of the body cavity. The carapace is largely made of chitin, a to back): untangles, antennae (the second antennae, used for swimming); maxillae; modified post-abdomen, and first legs, which are armed with a hook used in clasping.

Other, Another and A Whole Nuther

Other, Another and A Whole Nuther Other, Another and â€Å"A Whole Nuther† Other, Another and â€Å"A Whole Nuther† By Maeve Maddox Joan writes: So often I hear people use the word â€Å"nuther† when they mean â€Å"other†. Like in â€Å"thats a whole nuther story.†How did this happen? First, I don’t think that the word â€Å"nuther/nother† is being substituted for the word â€Å"other† in this expression. Rather, the word â€Å"whole† is being inserted between elements of the word another: a-whole-nother. It could be jocular usage, or it could be an example of metanalysis: The reinterpretation of the form of a word resulting in the creation of a new word; esp. the changing of the boundaries between words or morphological units. Our word apron, for example, used to be napron, but speakers hearing the words â€Å"a napron† thought they were hearing â€Å"an apron.† The same thing happened with auger, adder and umpire. Working in the other direction, what we call a newt used to be an ewt(e). Some speakers may try to correct a whole nuther story to the ungrammatical a whole other story with the result that the latter may become a common usage. As to how it happened A whole nuther/nother story has caught on because people who hear it like it. It also fits the patterns of English speech. The OED, for example, offers several uses of nother, most of them obsolete, but the word has a long history in the language. The Old English word oà ¾er meant â€Å"a second of two.† The merger of an (one) with other is documented from 1225. Another is different from the other: another refers indefinitely to any further member of a series of indeterminate extent. the other points to the remaining determinate member of a known series of two or more. I don’t think a whole nuther belongs in the speech or writing of news announcers or journalists who have a responsibility to adhere to standard usage, but its informal use in conversation doesn’t pain my grammar nerve. On the other hand, as blogger Dan Myers points out, if we use such constructions in jest, they will eventually come out of our mouths in earnest. Whats a Napron? an article of mine that appeared long ago in Highlights for Children. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Grammar category, check our popular posts, or choose a related post below:Homograph ExamplesProbable vs. PossibleArtist vs. Artisan