Flowers Are The Sweetest Things God Ever Made
A flower,sometimes known as a bloom or blossom,is the reproductive structure found in flowering plants plants of the division Magnoliophyta,also called angiosperms. The biological function of a flower is to facilitate reproduction,usually by providing a mechanism for the union of sperm with eggs.
Pollination have two types which is self-pollination and cross-pollination. Self-pollination happens when the pollen from the anther is deposited on the stigma of the same flower,or another flower on the same plant. Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species. Self-pollination happened in flowers where the stamen and carpel mature at the same time,and are positioned so that the pollen can land on the flower’s stigma. This pollination does not require an investment from the plant to provide nectar and pollen as food for pollinators Some flowers produce diaspores without fertilization parthenocarpy. Flowers contain sporangia and are the site where gametophytes develop. Many flowers have evolved to be attractive to animals,so as to cause them to be vectors for the transfer of pollen. After fertilization,the ovary of the flower develops into fruit containing seeds.
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Although the arrangement described above is considered "typical",plant species show a wide variation in floral structure These modifications have significance in the evolution of flowering plants and are used extensively by botanists to establish relationships among plant species. The four main parts of a flower are generally defined by their positions on the receptacle and not by their function. Many flowers lack some parts or parts may be modified into other functions and/or look like what is typically another part. In some families,like Ranunculaceae,the petals are greatly reduced and in many species the sepals are colorful and petal-like. Other flowers have modified stamens that are petal-like;the double flowers of Peonies and White Roses are mostly petaloid stamens Flowers show great variation and plant scientists describe this variation in a systematic way to identify and distinguish species. Specific terminology is used to describe flowers and their parts. Many flower parts are fused together;fused parts originating from the same whorl are connate,while fused parts originating from different.
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Many flowers have a symmetry. When the perianth is bisected through the central axis from any point and symmetrical halves are produced,the flower is said to be actinomorphic or regular,e.g. rose or trillium. This is an example of radial symmetry.
