Nature - Flower - online puzzles

Flower

A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). Flowers produce gametophytes, which in flowering plants consist of a few haploid cells which produce gametes. The "male" gametophyte, which produces non-motile sperm, is enclosed within pollen grains; the "female" gametophyte is contained within the ovule. When pollen from the anther of a flower is deposited on the stigma, this is called pollination. Some flowers may self-pollinate, producing seed using pollen from the same flower or a different flower of the same plant, but others have mechanisms to prevent self-pollination and rely on cross-pollination, when pollen is transferred from the anther of one flower to the stigma of another flower on a different individual of the same species.

Self-pollination happens 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.

Most flowering plants depend on animals, such as bees, moths, and butterflies, to transfer their pollen between different flowers, and have evolved to attract these pollinators by various strategies, including brightly colored, conspicuous petals, attractive scents, and the production of nectar, a food source for pollinators. In this way, many flowering plants have co-evolved with pollinators be mutually dependent on services they provide to one another—in the plant's case, a means of reproduction; in the pollinator's case, a source of food. After fertilization, the ovary of the flower develops into fruit containing seeds.

Flowers have long been appreciated by humans for their beauty and pleasant scents, and also hold cultural significance as religious, ritual, or symbolic objects, or sources of medicine and food.

White-red tulips puzzle online from photoPark Zdrojowy in Ciechocinek puzzle online from photoCoast on the Jutland Peninsula puzzle online from photoAlley in Druid Hill Park in Baltimore (USA) puzzle online from photoGerbers puzzle online from photoAutumn online puzzleSalmon Glacier (USA) online puzzlePuppies online puzzleMeadow online puzzleRoad covered by snow puzzle online from photoBlooming rhododendrons at the foot of the Appalachian Mountains (USA) online puzzlebouquet online puzzleOlive Grove (Israel) online puzzleAutumn journey puzzle online from photoPicturesque orchards in Hood River (USA) online puzzleSpring azaleas online puzzleLupine on the shore of Tekapo Lake (New Zealand) online puzzleLupine on the meadow (New Zealand) puzzle online from photowhat is that flower? online puzzleblue flower puzzle online from photoDomestic cats online puzzleBlooming apple tree puzzle online from photoPink gerberas online puzzlePansies online puzzle
Beautiful sakuras (Taiwan) online puzzleYellow rose online puzzlebirthday puzzle online from photoYorkshire terrier puppy puzzle online from photoVineyard in Lavaux (Switzerland) puzzle online from photoFloral mix online puzzleForest covered with blue bellflowers (United Kingdom) online puzzlePark in Baden-Baden (Germany) puzzle online from photoMulticolored composition with dahlias and gerberas online puzzleOrange tulips online puzzleApe Santa Rita puzzle online from photoTropical gardens around Monte Palace on Madeira (Portugal) puzzle online from photoA stall with artificial flowers puzzle online from photoWhite-red and yellow tulips puzzle online from photoflowers puzzle online from photoFlowers in the window of a house in Wallis (Switzerland) online puzzleColorful flowers in Druid Hill Park in Baltimore (USA) online puzzlePan-American Motorway in Alaska (USA) puzzle online from photoFlowerpots puzzle online from photoFlowers in pots puzzle online from photoThree Crowns (Poland) puzzle online from photocollage puzzle online from photoAmazing Autumn Colors puzzle online from photoRhododendron shrubs puzzle online from photo