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Encyclopedia > Unisexual

Unisexual species are those in which each individual generally shows the characteristics of only one sex, such as animal species which are divisible into male or female or plant species which are divisible into pistillate or staminate. Good examples of this type of pollination are hollies, and kiwifruit. In these plants the male plant which supplies the pollen is referred to as the pollenizer. In biology, a species is one of the basic units of biodiversity. ... Look up Sex in Wiktionary, the free dictionary. ... The shield and spear of the Roman God Mars are often used to represent the male sex In heterogamous species, male is the sex of an organism, or of a part of an organism, which typically produces smaller, mobile gametes (spermatozoa) that are able to fertilise female gametes (ova). ... The mirror of the Roman Goddess Venus is often used to represent the female sex. ... Amaryllis style and stigmas A carpel is the female reproductive organ of a flower; the basic unit of the gynoecium. ... Stamens of the Amaryllis with prominent anthers carrying pollen Insects, while collecting pollen, accidentally transfer it from one flower to another, bringing about pollination The stamen is the male organ of a flower. ... A flower-fly pollinating a Common Daisy (Bellis perennis) Pollination is an important step in the reproduction of seed plants: the transfer of pollen grains (male gametes) to the plant carpel, the structure that contains the ovule (female gamete). ... Species Ilex ambigua- Sand Holly Ilex amelanchier- Swamp Holly Ilex aquifolium- European Holly Ilex bioritsensis Ilex buergeri Ilex canariensis- Small-leaved Holly Ilex cassine- Dahoon Holly Ilex centrochinensis Ilex ciliospinosa Ilex colchica Ilex collina Ilex corallina Ilex coriacea Ilex cornuta- Chinese Holly Ilex crenata- Japanese Holly Ilex cyrtura Ilex decidua... The kiwifruit is the edible fruit of a cultivar group of the woody vine Actinidia deliciosa and hybrids between this and other species in the genus Actinidia. ... SEM image of pollen grains from a variety of common plants: sunflower (Helianthus annuus), morning glory (Ipomoea purpurea), hollyhock (Sildalcea malviflora), lily (Lilium auratum), primrose (Oenothera fruticosa), and castor bean (Ricinus communis). ... The words pollenizer (polleniser) and pollinator are often confused. ...

It does not define a sexuality (such as homosexuality), but rather a state of being. It means one has only one kind of sexual organ, as opposed to both kinds as a hermaphrodite would. The word homosexuality has acquired multiple meanings over time. ... The 1st-century BC sculpture The Reclining Hermaphrodite, in the Museo Palazzo Massimo Alle Terme in Rome In zoology, a hermaphrodite is an organism of a species whose members possess both male and female sexual organs during their lives. ...

See also

  Results from FactBites:
Plant sexuality - Wikipedia, the free encyclopedia (925 words)
Unisexual - Reproductive structure that is either functionally male or functionally female.
Monoecious - having unisexual reproductive units (flowers, conifer cones, or functionally equivalent structures) of both sexes appearing on the same plant; from Greek for "one household".
A fair degree of correlation (though far from complete) exists between dioecy/sub-dioecy and plants that have seeds dispersed by birds (both nuts and berries).
Preschool Flowers Fast Facts (762 words)
However, in some species of plants the flowers are unisexual: having only either male (stamens) or female (pistil) parts.
In some of these species, an individual plant is either male or female and the species is regarded as dioecious; in others, the unisexual male and female flowers appear on the same plant and the species is termed monoecious.
Unisexual male and female flowers on the same plant may not appear at the same time, or pollen from the same plant may be incapable of fertilizing its ovules.
  More results at FactBites »



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