pollen competition

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• Compétition spermatique — Dans la nature, l’apparente extravagance des traits arborés par les mâles de certaines espèces, et leur sous jacent impact sur leur survie, inspira Darwin[1] dans le développement de la théorie de la sélection sexuelle. Un siècle plus tard, les… …   Wikipédia en Français

• Expansines — Les expansines forment une famille de protéines non enzymatiques, étroitement apparentées entre elles, qui ont la capacité d induire la relaxation des tensions et l extension des parois des cellules végétales de façon pH dépendante[1]. Les… …   Wikipédia en Français

• Cucurbita foetidissima — Cucurbita foetidissima, männliche Blüte Systematik Rosiden …   Deutsch Wikipedia

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… …   Universalium

• community ecology — Introduction       study of the organization and functioning of communities (community), which are assemblages of interacting populations of the species living within a particular area or habitat.       As populations of species interact with one …   Universalium

• Ecological facilitation — Facilitation describes species interactions that benefit at least one of the participants and cause harm to neither (Stachowicz 2001). Facilitations can be categorized as mutualisms, in which both species benefit, or commensalisms, in which one… …   Wikipedia

• angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

• Bumble bee — For other uses, see Bumblebee (disambiguation) and Bombus (disambiguation). Bombus Bombus terrestris Scientific classification …   Wikipedia

• Bumblebee — Taxobox name = Bombus image width = 200px image caption = male Bombus terrestris robbing nectar regnum = Animalia phylum = Arthropoda classis = Insecta ordo = Hymenoptera familia = Apidae subfamilia = Apinae tribus = Bombini genus = Bombus genus… …   Wikipedia

• plant development — Introduction       a multiphasic process in which two distinct forms succeed each other in alternating generations. One form, created by the union of sexual cells (gametes (gamete)), contains two sets of similar chromosomes (diploid). At sexual… …   Universalium