Chapter 18 Outline: Diversity and Variation 18.1 The Species Concept TAXONOMY- classifying organisms in ways that reflect relationships and help distinguish one type of organism from another. SPECIES- group of organisms that is capable of breeding offspring‚ or mating‚ with another in nature to produce fertile offspring. Individual members of a species may look very different from eachother. Such differences among members of a species are known as variations Natural selection
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apes. This led me to wonder if there was in fact a difference between monkeys and apes‚ or if they were just two different ways of saying the same thing. From researching this topic‚ I found that monkeys and apes belong to the same Domain‚ Kingdom‚ Phylum‚ Class‚ Order‚ and Sub Order‚ but have a number of profound differences that show up in what Family they belong to. Apes belong to the Sub Order Anthropoidea‚ which also includes monkeys and humans. However‚ they have their own Family‚ Hominoidea
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spotted ragged tooth shark‚ slender-tooth shark‚ spotted sand tiger shark and ground shark. Currently the Sand Tiger Shark is vulnerable and is still living in some areas of the world today. The domain of the Sand Tiger Shark is Eukaryote and its phylum is chordate. According to National Geographic Sand Tiger Shark get their name “from their tendency toward shoreline habitats‚ and they are often seen trolling the ocean floor in the surf zone‚ very close to shore.”
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Leeches in medicine Leeches belong to the phylum Annelida‚ class Hirudinea. They are exoparasites‚ meaning that they are located on the skin surface. Leeches feed on blood‚ they use suckers to attach on their hosts skin. They are dorso-ventrally flattened‚ have segmented bodies = each leech has a fixed number of segments – 34. 2 suckers are located at each end of the body (posterior and anterior). Leeches are hermaphrodites. Leaches are bilaterally symmetrical‚ with thick muscular segmented bodies
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bioluminescence by North Americans is the firefly‚ which lights its abdomen during its mating season to communicate with potential mates. This bioluminescent ability occurs in 25 different phyla many of which are totally unrelated and diverse with the phylum Fungi included in this list (an illustration of a bioluminescent fungi is displayed in figure 1). One of the features of biological light that distinguishes it from other forms of light is that it is cold light. Unlike the light of a candle‚ a lightbulb
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honor Theodor Escherich. E coli are normally harmless and are part of the normal flora found in the lower intestines of humans and healthy cattle. Some E. coli serotypes are known to cause serious food poisoning in humans. E. coli belongs to the phylum of Proteobacteria‚ it is in the class of gammaproteobacteria and the family of enterobacteriaceae. There are around 200 different E.coli serotypes. When stained‚ E. coli appears as gram-negative bacilli. It appears in pairs or singly. E. coli is non
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Ceratopsians and Pachycephalosaurs Around 144 million years ago‚ began the emergence of the Ornithischian dinosaurs during the cretaceous period and diversified into North America and Asia. Ornithischians were classified as having a hip structure similar to that of birds‚ although they are not the descendants of birds. Marginocephalians‚ meaning "fringed heads" are a group of Ornithischians that have a distinctive skull structure‚ consisting of a slight shelf or bony frill on the back of the
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1. Define analogous and homologous traits and provide an example of each. Animal classifications and the field that specializes in it is called taxonomy. Traditionally‚ organisms are categorized according to their physical similarities. This was the first systematic classification constructed by Carolus Linnaeus in the eighteenth century. Currently‚ basic physical similarities are considered‚ however‚ for these similarities to be of any help‚ they must reflect evolutionary descent. Furthermore‚
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under the Naja genus‚ which most cobra species are‚ they have their own genus Ophiophagus. Their Taxonomy: Ophiophagus Hannah belongs to the monotypic genus Ophiophagus. It is classified under the family Elapidae‚ order squamata‚ class reptilian‚ phylum chordate‚ kingdom animalia. They are the longest venomous snakes in the world; their length is up to 18.5 to 18.8 feet (5.6 to 5.7 m). Their weight is Up to 20 lbs(9 kg). they can raise up to one-third of their bodies straight off the ground and
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SCI 2020 Study Guide for Exam 1 on September 14‚ 2012 Ch. 14 How did reading books by Lyell and Malthus influence Darwin’s development of the theory of evolution? - From Lyell‚ Darwin saw that species gradually changed over time o Example: the Finches - From Malthus‚ Darwin perceived the idea of natural selection o Survival of the fittest o Those species that possessed physical‚ behavioral or other attributes survived over those who didn’t
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