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egg apparatus

См. также в других словарях:

  • egg apparatus — noun : a group of three cells at the micropylar end of the embryo sac in seed plants consisting of the egg and two sterile cells * * * egg apparatus noun (botany) The egg and the synergidae in the embryo sac of an angiosperm • • • Main Entry:… …   Useful english dictionary

  • Egg case (Chondrichthyes) — Egg case of a skate. An egg case or egg capsule, colloquially known as a mermaid s purse or devil s purse, is a casing that surrounds the fertilized eggs of some sharks, skates, and chimaeras. They are among the common objects which are washed up …   Wikipedia

  • egg|head|ism — «EHG HEHD ihz uhm», noun. Informal. intellectualism: »Los Alamos is replete with the apparatus of eggheadism the little theater, the well stocked library, the concert association (Wall Street Journal) …   Useful english dictionary

  • germinal apparatus — noun : egg apparatus …   Useful english dictionary

  • micropyle apparatus — (ARTHROPODA: Insecta) Raised structures around the micropyle of an egg …   Dictionary of invertebrate zoology

  • 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

  • Gynoecium — A gynoecium (from Ancient Greek gyne , woman ) is the female reproductive part of a flower. The male counterpart is called an androecium . A gynoecium is composed of one or more pistils. A pistil may consist of a single free carpel, or be formed… …   Wikipedia

  • Megaspore — Plant ovules with megasporocytes before meiosis: Gymnosperm ovule on left, angiosperm ovule (inside ovary) on right Megaspores, also called macrospores, are a type of spore that is present in heterosporous plants. These types of plants have two… …   Wikipedia

  • Megagametogenesis — is the development of a megaspore into an embryo sac, which is the gametophyte though a highly reduced one stage in the life cycle of vascular plants. Contents 1 Eudicots 2 Monocots 3 See also 4 …   Wikipedia

  • Яйцевой аппарат — * яйцавы апарат * egg apparatus у растений комплекс из яйцеклетки (см.) и двух окружающих ее синергид, расположенный в верхней микропильной части зародышевого мешка (см.) …   Генетика. Энциклопедический словарь

  • 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

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