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PostCladodes (also called cladophylls or phylloclades) are shoot systems in which leaves do not develop; rather, the stems become flattened and assume the photosynthetic functions of the plant. In asparagus (Asparagus officinalis; Asparagaceae), the scales found on the asparagus spears are the true leaves. If the thick, fleshy asparagus spears continue to grow, flat, green, leaflike structures called cladodes develop in the axils of the scale leaves. The presence of cladodes in unrelated desert angiosperm families is an excellent example of convergent evolution, or the independent development of the same characteristic in unrelated taxa.By: rupaliWednesday, Jul 21, 2021YOUTH EMPOWERMENT+1
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ArticlePolyploidyGenomic analysis also has shown that one of the important mechanisms of evolution is multiplication of chromosome sets, resulting in polyploidy (“many genomes”). In plants and animals, spontaneous doubling of chromosomes can occur. In some plants, the chromosomes of two related species unite via cross-pollination to form a fusion product. This product is sterile because each chromosome needs a pairing partner in order for the plant to be fertile. However, the chromosomes of the fusion product can accidentally double, resulting in a new, fertile species. Wheat is an example of a plant that evolved by this means through a union between wild grasses, but a large proportion of plants went through similar ancestral polyploidization.By: rupaliWednesday, Jul 21, 2021HEALTH AND NUTRITION+1
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PostThe study of disease is called pathology. It involves the determination of the cause (etiology) of the disease, the understanding of the mechanisms of its development (pathogenesis), the structural changes associated with the disease process (morphological changes), and the functional consequences of those changes. Correctly identifying the cause of a disease is necessary to identifying the proper course of treatment. Ref: http://www.aptimize.com/By: rupaliMonday, Sep 20, 2021AGRI-FOOD SYSTEMS+2
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Posthttps://aap-qa.apps.venturit.org/pathway/natural-language-or-ordinary-languageBy: rupaliTuesday, Jul 20, 2021EDUCATION
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Posthttps://aap-qa.apps.venturit.org/AAPBridge/groups/science/stories/coronaviruses-cov-are-a-large-family-of-viruses-that-cause-illness-ranging-from-the-common-coldBy: rupaliTuesday, Jul 20, 2021EDUCATION
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OpportunityMyxomatosisMyxomatosis, formally infectious myxomatosis, or myxomatosis cuniculi, a highly fatal infectious viral disease of rabbits. It is characterized by fever, swelling of the mucous membranes, and the presence of nodular skin tumours. The disease exists naturally in populations of certain South American rabbits of the genus Sylvilagus and has been introduced into western Europe and Australia as a means of rabbit population control.By: rupaliMonday, Jul 19, 2021CULTURE AND SOCIETY+1
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PostIn populations of finite size, the genetic structure of a new generation is not necessarily that of the previous one. The explanation lies in a sampling effect, based on the fact that a subsample from any large set is not always representative of the larger set. The gametes that form any generation can be thought of as a sample of the alleles from the parental one. By chance the sample might not be random; it could be skewed in either direction. For example, if p = 0.600 and q = 0.400, sampling “error” might result in the gametes having a p value of 0.601 and a q of 0.399. If by chance this skewed sampling occurs in the same direction from generation to generation, the allele frequency can change radically.By: rupaliMonday, Jul 19, 2021AGRI-FOOD SYSTEMS+1
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