synergids

См. также в других словарях:

• 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

• Double fertilization — The parts of a flower Double fertilization …   Wikipedia

• Flowering plant — Flowering plants Temporal range: Early Cretaceous Recent …   Wikipedia

• Apomixis — Not to be confused with automixis or autogamy. This article deals almost exclusively with plants. For similar processes in animals and Oomycetes, see Parthenogenesis. In botany, apomixis was defined by Winkler as replacement of the normal… …   Wikipedia

• Ovule — This article is about the plant structure. For animal ovules, see ovum. Micropyle and Ovular redirect here. For the structure in animals, see Micropyle (zoology). For the shape, see oval. Location of ovules inside a Helleborus foetidus flower… …   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

• 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

• embryo sac — The mature female gametophyte in angiosperms. Generally a seven celled structure two synergids, one egg cell, three antipodal cells (each with a single haploid nucleus) and one endosperm mother cell with two haploid nuclei …   Glossary of Biotechnology

• filiform apparatus — noun : a prolongation of the synergids beyond the summit of the embryo sac …   Useful english dictionary