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1- A) What types of data document patterns and processes of evolution? B) What does homology mean and how is it important with respect to evolution? How types of homology are for providing evidence of evolution? C) does the fossil record provide support for the of evolution? Why do sugar gliders and flying squirrels look so much alike? D) What do we call the similarity between flying squirrels and sugar gliders? E) Provide a complete explanation for the question, what is evolution Vocabulary Solution Answer A) There are mainly four types of data which document patterns and process of evolution; Homology, fossil record, direct observations and biogeography. Answer B) Homology means sharing a similar structure due to relatedness. this is important with respect to evolution because homology tells us that two different animals which shares the homology structures had a common ancestor during evolution. there are two types of homology in evolution; paralogs, which tells us that two copy of one gene located at two different positions on genome inside a single organism has evolved as a duplication event and such genes are called paralogous. while orthologs tells us that if two genes are similar in two different organism\'s genomes then they were originated in their ancestor. Answer C) Yes, fossil record is one of the data documentation for the evolutionary studies and they help to find the missing links between various points of evolution. sugar gliders and flying squirrels look alike because they share similarity in structures such as white belly, big eyes, same size, and a thin layer of skin under the legs for gliding in the air. Answer D) We call this kind of similarity in same functional structures as analogy..
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Please place all the terms into a concept map. Please be sure to describe the nature of the connections and describe WHY each linkage is made. (we need to connect the words with lines with a word or two beside it describing how they are connected, appreciate your help). Terms: Microevolution, macroevolution, \"On the Origin of Species\" Selective breeding Sticklebacks speciation experimental evolution extinction law of succession transitional fossil vestigal homology molecular homology convergent evolution common ancestor uniformitarianism radiometric dating Geologic time scale Solution i) Microevolution: As the name suggests it a kind of evolution happens in a small group (micro) over a short period of time. On the contrary ii) Macroevolution: describes us about a major evolutionary change of a group (taxonomic) over a long period of time. iii) \"On the origin of species\": Basically it is a book written by Darwin. As our father of evolutionary studies Charles Darwin suggests by means of natural slection favoured species only exists, this is the basis of evolution. iv) Selective breeding: where we use artificial breeding method to select particularly a phenotypic trait and produce it, like plant breeding methods in a artificial way. v) Sticklebacks: A family of fish most commonly found in oceans, also found in fresh waters. They are found in continents like Asia, Africa, North America. They are also realted to seahorses. vi) Speciation: Through the process of evolution the formation of new species is known as speciation. vii) Experimantal evolution: This is to talk about the laboratory invented process of manipulating and controlling the evolutionary process in an controlled environment. viii) Extinction: When through the process of evolution species get extinct from the face of earth, or they get ousted or completely removed. ix) Law of Succession: In order to establish a species on an area(eg-barren land) there must be primary species like moses and lichens to go and settle down then over the period of time other species settles. x) transitional fossil: Transition simply means the relation between the old and the new (that has evolved), similarly transitional fossil are those which shows similarity between their ancestors and also to the decendents, the relation between or link between them. xi) Vestigal: We call any organ vestigial when its no more in use, like a rudimentary or remnant of something, some organ that was in use before. eg- Vestigial wings of Kiwis are hidden entirely. xii) homology: Simple meaning is similarity of analogy like protein structure are same in many proteins, so they have homology. xiii) Molecular homology: When we find the molecular level similarity, as in cases of some protein structure have alpha chains similarity. xiv) convergent evolution: Independent evolutuion also known as, where species have evolved independent to each other. xv) common ancestor: Common sharing from where organisms evolved, like under t.
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1) Give one example of each of the following. a) a homologous molecular trait shared by all cellular organisms. b) a body part adapted to different functions in different species but showing clear homology of underlying structure. c) a non-homologous similarity between organisms adapted to similar habitats or niches (use an example NOT given in lecture). d) Amolecular vestigial trait shared by all primates, but not most other mammals. e) Amorphological vestigial trait shared by humans and great apes (chimpanzees, gorillas, etc.)but not vestigial in other primates (e.g. monkeys). 2) What is meant by the \"ambiguity\" of species boundaries, and why did Darwin use it as part of his argument for common descent? 3) The picture below shows three species as embryos (left) and as adults (right). What is the name of the phenomenon it illustrates? What evidence does the phenomenon give about evolution? Solution 1. a.Aminoacids : The 20 aminoacids are same in all cellular orgainsms. b.Forelimbs c.Stream lined body of sharks and whales, wings of birds and insects. d.The gulono--lactone oxidase (GLO) pseudogene. e.Coccyx is present in humans and great apes as fused bone but is not present in monkeys as they have tails. 2.Ambiguity of species boundaries means there is always a confusion as to which organisms can be grouped into species; wheather sexually reproducing organisms and asexually reproducing organisms.What boundaries should exist so as to group organisms into species has always been ambiguous.No such species boundaries were set earlier.Darwin used it as a part of his argument for common ancestor because according to him god had created the species and this was known as Creationism and he emphasized on the process of natural selection to be an active process that led to evolution from common ancestor. 3.The phenomenon that the diagram illustrates is homology.Homology in embryo is known as ontogenetic homology and means that two or more species share same embryological similarities and it gives an evidence that all the three embryos of species have a common ancestor but in process of time have undergone remodelling of body parts through natural selection..
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