Evolution of Australian Biota 1. Evidence for the rearrangement of crustal plates and continental drift indicates that Australia was once part of an ancient super continent Identify and describe evidence that supports the assertion that Australia was once part of a landmass called Gondwana including: Matching continental margins Gondwana once consisted of South America‚ Africa‚ Madagascar‚ India‚ Antarctica‚ Australia‚ New Zealand and New Guinea. Continental margin: zone between the ocean basin
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Evolution of Australian Biota done by George 1. Construct a timeline that identifies the key events in the formation of Australia as an island continent from its origins as part of Gondwana: mya = million years ago scale=1 cm:10 mya 2. Illustrate the direction of movement and position of continents over time by constructing a series of diagrams of the continents that formed from Gondwana. For each set of diagrams include how many millions
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a) Discuss current research into the evolutionary relationships between extinct species‚ including megafauna and extant Australian species. Megafauna simply means large animals‚ in which most have become extinct within the last 20 000 to 50 000 years. The extinction of megafauna was‚ debatably‚ due to climate change and human expansion. Although‚ Africa still retains some megafauna‚ such as the elephant or the rhinoceros. Australia has managed to keep many examples of relict species‚ some from
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Preliminary Biology: Topic Summary Australian Biota Matt Elrick 1. Evidence for the rearrangement of crustal plates and continental drift indicates that Australia was once part of an ancient super continent 1.1 Identify and describe evidence that supports the assertion that Australia was once part of a landmass called Gondwana‚ including: - matching continental margins - position of mid-ocean ridges - spreading zones between continental plates - fossils in common on Gondwanan continents including
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Evolution of Australian Biota A) Baragwanathia Baragwanthia fossils were first discovered in Yea‚ Victoria in 1875 and were first described as a lycopod which was derived from the Zosterophylls by Australia’s eminent pioneer botanist‚ Dr Isobel Cookson in 1935. The Fossils of Baragwanthia are believed to date back to the Silurian times. Baragwanthia had long pores which were roughly 1-2 millimetres in radius and is densely covered in leaves that are 4cm in length. The stems could be up
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BKristen Gershkoff Mr. Zabel Ecology 1 October 2012 How Abiotic Factors Affect the Biota The variation of abiotic factors in both the beach and the salt pond greatly affect the biota in those areas. At the beach there was a rocky landscape that rounded the water‚ while at the salt pond‚ there was more of a wet grassy area allowing different life forms or biota to thrive in each. Also‚ physical factors such as temperature‚ salinity‚ or dissolved oxygen levels allow for different life forms to
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Biology: Research Task and Oral PresentationResearch Task:1.Describe some mechanisms found in Australian fauna to ensure:•Fertilisation•Survival of the embryo and of the young after birthFertilisation is the fusion of haploid sex cells in the action of sexual reproduction. It is often a difficult process as:• careful timing is required: both female and male gametes need to be produced and released at the same time• arrangements need to be made to bring the gametes together• A watery medium is always
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10I-0207 SECTION: ‘C’ PRESENTATION: ENGLISH The Evolution of the Human | The universe is constructed from a multitude of various materials. It is dynamic in form and shape due to a multitude of various processes and interactions between these materials. To the human‚ however‚ in his need to establish his place and purpose in the universe‚ the most important material is biological and the most important process is evolution‚ far it is only here that the human can learn to understand himself
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The Origin and Evolution of Life on Earth Why do we start the discussion of biology with a discussion of geology? Here are some reasons why one would do this: * All life on earth is linked to geology; likewise‚ many surface geologic features and processes have been influenced by life on earth. The origin and early evolution of the earth are especially important when looking at the origin and early evolution of life on earth. * Life chemistry had its origin with the elements available to
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Theory of Evolution One of the greatest questions of all time is: "Where did we all come from?" One of the most popular answers to this question is creationism‚ the idea that everything was created by a higher being. Another popular idea is evolution‚ the idea that all living organisms descended from a less complex organism. Evolution possesses a new way of thinking that is being greatly accepted by the scientific community‚ but not by pious groups of people. Creation and evolution are diametrically
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