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Sunday, December 8, 2013

Flower

Flower, sometimes known as a bloom or blossom, is the reproductive structure found in vizoring plants. Flowers need sporangia and nuclear anatomy 18 the site where gametophytes develop. Flowers give rise to payoff and trip upds. umpteen develops have evolved to be attractive to animals, so as to make believe them to be vectors for the transfer of pollen. distinguishable Parts of flower sepal a circumscribed page number, fall in of the outermost of the four groups of flower parts. The sepals of a flower are collectively called the calyx and act as a overprotective binding of the inner flower parts in the bud. Sepals are commonly green, but in some flowers (e.g., the lily and the orchid) they are the resembling color as the petals and may be confused with them. In some groups of plants (e.g., the marshland marigold and the anem one) they are absent. The small green leaf like structures at the base of the flower head in the aster family are non true sepals but bracts; the sepals are modify into a rophy of tiny white hairs on the ovary (the pappus; see aster). The sepals are sometimes fused into a tube near the base of the petals, as in the mint family. Petal , one of the four primary parts of a flower, next inmost organ from the sepal. The spiral of petals is known collectively as the corolla.
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The number of petals is usually constant quantity within groups, as are the numbers racket of the some other organs. Identification by number is, however, complicated by miscellaneous factors; the petals may be fused, inconspicuous, or entirely absent, in which sideslip their role as the showy part of the flower is sometimes supplanted by modified leaves, the bracts, as in the dogwo! od and poinsettia, or by modified stamens, as in the canna and the ladys-slipper. selective gentility can produce petal like stamens and questionable parlay flowers, i.e., varieties with more than the normal number of petals. Petals are usually bright colored and often secrete perfume and nectar. When saturation has taken place the petals usually drop off; however, in some...If you pauperism to get a full essay, order it on our website: OrderEssay.net

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