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  2. Flowering plant - Wikipedia

    en.wikipedia.org/wiki/Flowering_plant

    Angiosperm flower showing reproductive parts and life cycle. The characteristic feature of angiosperms is the flower. Its function is to ensure fertilization of the ovule and development of fruit containing seeds. [55] It may arise terminally on a shoot or from the axil of a leaf. [56]

  3. Alternation of generations - Wikipedia

    en.wikipedia.org/wiki/Alternation_of_generations

    The life cycle of a dioecious flowering plant (angiosperm), the willow, has been outlined in some detail in an earlier section (A complex life cycle). The life cycle of a gymnosperm is similar. However, flowering plants have in addition a phenomenon called ' double fertilization '.

  4. File:Angiosperm life cycle diagram-en.svg - Wikipedia

    en.wikipedia.org/wiki/File:Angiosperm_life_cycle...

    Description: The life cycle of a floral plant — angiosperm. Date: 13 February 2007: Source: did it myself based in at least 5 illustrations but mainly on a image from Judd, Walter S. , Campbell, Christopher S. , Kellog, Elizabeth A. and Stevens, Peter F. 1999.

  5. Evolutionary history of plants - Wikipedia

    en.wikipedia.org/wiki/Evolutionary_history_of_plants

    Angiosperm life cycle. All multicellular plants have a life cycle comprising two generations or phases. The gametophyte phase has a single set of chromosomes (denoted 1n) and produces gametes (sperm and eggs). The sporophyte phase has paired chromosomes (denoted 2n) and produces spores.

  6. Cretaceous Terrestrial Revolution - Wikipedia

    en.wikipedia.org/wiki/Cretaceous_Terrestrial...

    The Cretaceous Terrestrial Revolution (abbreviated KTR), also known as the Angiosperm Terrestrial Revolution (ATR) by authors who consider it to have lasted into the Palaeogene, [1] describes the intense floral diversification of flowering plants (angiosperms) and the coevolution of pollinating insects, as well as the subsequent faunal radiation of frugivorous, nectarivorous and insectivorous ...

  7. Double fertilization - Wikipedia

    en.wikipedia.org/wiki/Double_fertilization

    The parts of a flower Double fertilization. Double fertilization or double fertilisation (see spelling differences) is a complex fertilization mechanism of angiosperms.This process involves the fusion of a female gametophyte or megagametophyte, also called the embryonic sac, with two male gametes (sperm).

  8. Pollen tube - Wikipedia

    en.wikipedia.org/wiki/Pollen_tube

    Angiosperm life cycle. The male reproductive organ of the flower, the stamen, produces pollen. The opening of anthers makes pollen available for subsequent pollination (transfer of pollen grains to the pistil, the female reproductive organ). Each pollen grain contains a vegetative cell, and a generative cell that divides to form two sperm cells.

  9. Aloe comosa - Wikipedia

    en.wikipedia.org/wiki/Aloe_comosa

    Naturally, Aloe comosa follows the typical angiosperm life cycle. Like most South African aloes, it blooms in the summer. Tall inflorescences (flower stems) that can reach 2 meters (6.7 feet) in height branch from the rosette. At the tips of the inflorescences are flower spikes which are composed of many small, tightly compacted flowers.