Chitin is one of the most abundant polysaccharide in nature‚ being only second after cellulose. It can be found in animals (exoskeletons of crustacean and insects) as well as in fungi‚ mushrooms and yeasts. Chitin can be described as a biopolymer composed of N-acetyl-D-glucosamine; a chemical structure very close to cellulose except that the hydroxyl group in C of cellulose is replaced by an acetamido group in chitin. One can associate this chemical similarity between cellulose and chitin as serving
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INSECTS Insects‚ being larger and having a hard‚ chitinous and therefore impermeable exoskeleton‚ have a more specialised gas exchange system. Insects have no transport system so gases need to be transported directly to the respiring tissues. There are tiny holes called spiracles along the side of the insect. The spiracles are openings of small tubes running into the insect’s body‚ the larger ones being called tracheae and the smaller ones being called tracheoles. The ends of these tubes‚ which
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Missing The wasp‚ or Vespula Vulgaris‚ as it is known scientifically‚ is an insect. It’s color is black and yellow; it has a length of one-half inches and a wing span of 0.0079 inches. As all insects‚ the wasp has bilateral symmetry‚ an exoskeleton‚ two eyes‚ six legs‚ and three body parts. It has two antenna and 2 wings. The wasp is part of the Animalia Kingdom‚ Arthropoda Phylum & Insecta Class. The life cycle of a wasp begins with an egg and ends sometime between 12 days and 12 months
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today: The Chelicerates and The Mandibulates Exoskeletons • Strength and impermeability • Solves difficulties of life on land: – desiccation – need for structural support • BUT: must molt to grow (ecdysis) Grasshopper molting Phylum Arthropoda “arthropods” • > 1 million spp.‚ most of them insects (most of those‚ beetles) • Most diverse‚ widely distributed & abundant of all animal phyla Arthropod innovations • Exoskeleton of chitin * Hard & strong * Impermeable to water
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What is Transhumanism Transhumanism was best summed up by Max More in that it is “a class of philosophies of life that seek the continuation and acceleration of the evolution of intelligent life beyond its currently human form and human limitations by means of science and technology‚ guided by life-promoting principles and values.”(Max More‚ 1990) Over the course of this paper we will discuss the ins and outs of Transhumanism. What it is‚ where it’s going‚ if it’s ethical‚ and if it is something
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The Five Themes of Biology Transfer of energy: the movement of energy from one place to another‚ matter can not be created nor destroyed Bioheat transfer: heat transfer in biological systems. How heat moves from one compartment‚ be it within the body or external to the body‚ to another compartment in the body Osmosis: Water moving from high concentration to a low concentration Diffusion: Particles moving from high concentration to a low concentration Unity and Diversity: how things are similar
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angel shale and muav limestone it would appear that there was a relatively shallow‚ warm sea. This is indicated by the presence of Trilobite fossils found in this layer which thrived in that environment. Trilobites were early animals that had exoskeletons that are usually the only part of them that is preserved in the fossil record. They were marine bottom feeders who thrived in warm nutrient rich waters. The Redwall and Temple Butte limestone that compromises the next layer of rock and the marine
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trials and errors from different raw materials to be made into a more durable and long lasting chalk. Until they found out that seashells is made up of calcium carbonate that can also be found in chalk. The term seashells usually refer to the exoskeleton of invertebrate animals. Most seashells are commonly found at the beaches but in a variety of habitats it is also possible to find shells from freshwater animals. But what was known in these animals they are made up of calcium carbonate. It will
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bodies in different ways. For example‚ sea anemones have a hydrostatic skeleton that produces support via sheets of muscles and an internal cavity filled with fluid. Other invertebrates such as insects and crustaceans have a hard outer shell or exoskeleton. An estimated 97% of all species are alive today are invertebrates. Of all invertebrates‚ the insects are by far the most numerous. There are so many species of insects that scientists have yet to discover them all‚ let alone name or count them
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Mollusca-Gastropods/Bivalves/Cephalopods------Coelomic cavity‚ first heart/respiratory system. Phylum: Annelida-Earth worms/marine worms/leeches----Coelomic and segmented. Phylum: Arthropoda-Chelicerata/mandibulate. crustaceans/spiders/insects------exoskeleton‚ jointed appendages‚ flight. Phylum: Echinodermata-starfish/sea urchins/sand dollars/sea cucumbers—Deuterostome development BilateralRadial‚ Endoskeleton‚ water vascular system. Phylum: Chordata- Non-vertebrate chordate(no skull) and vertebrate
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