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Q. Show the Paleobotanical Evidence?
Paleobotany deals with the study of fossil records of plants and animals. New techniques and approaches to the study of fossil flowering plants provide taxonomic information. Paleobotany uses microfossils such as pollen or macrofossils of leaves, stems and other plant parts as source of data. Recent collection of well preserved angiosperm flowers from Eocene sediments of the southern United States and from kansas confirm the presence of diversified representatives of the present day "Amentiferae line" by middle Eocene time and their adaptation for wind pollination. Flowers and inflorescences with structural features allowing pollination by beetles, flies, beas, and butter flies were still in existence by middle Eocene. An extraordinary data source has been provided by the organic chemical profiles of miocene leaf Specimen s 'of Acer, Celtis, Ouercus, ulmus and zelkova. A high degree of correlation between chemical compounds of the fossils and those of modern species was found. Data provided by Paleobotany allow taxonomists to deal with the facts of the fossil record about angiosperms and their possible progenitors. However, the available data is still too limited for the construction of a valid general phylogenetic scheme.
cutaneous respiration
Explain single pan balance and Electronic Digital Balance? Single Pan Balance: This is a very sensitive balance used for weighing quantities less than 10 grams. It accurately w
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Q. What are the Signs of cardiac tamponade? The clinical presentation will be that of a low output state with anxiety, restlessness, dyspnoea, sweating, cold extremities and dr
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