male gametophyte

Listing 1 - 10 from 32 for male gametophyte

Class Pinatae
... Pinus Life Cycle of Pinus Microspore Development of Pinus Development of the female gametophyte in Pinus Development of the male gametophyte in Pinus Order Coniferales Family Pineaceae Family Taxodiaceae - (Genus Sequoia) Family Cupressaceae ...
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Class Pinatae
Class Pinatae Development of the male gametophyte in Pinus Return to Main Menu Class Pinatae
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The Pines
... Male reproductive organs The male cone or microstrobilus is simply an axis bearing microsporophylls, each with two pollen-filled microsporangia. Biodisc photomicrograph0 In the microspore the male gametophyte ... cell divides. The single megaspore in each ovule divides initiating the female gametophyte. Fresh immature female cone split longitudinally - pearl-like ovules conspicuous. (photo by James ...
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Caribbean Pine
... the sporophyte. The microspores or pollen grains dispersed from the male cones are windborne. Within each pollen grain is a minute male gametophyte. From pollination to seed maturity takes about 2 years. The ...
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Genetic Extra Credit LM 53-54
... Seed Chromosome Numbers In Polyploid Plants I prefer the terms "gametophyte" and "sporophyte" when dicussing polyploid chromosome numbers. Gametophyte refers to the chromosone number of gametes and sporophyte refers ... ScanTron answer sheet. For example a fractional value of 1/100 = .01 = 1%. Angiosperm Male Gametophyte Questions: 23-28. A mature angiosperm pollen grain contains a tube nucleus and a ...
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Azolla and Anaebaena Symbiosis
... gametophyte, which produces the actual sex organs (the female archegonium and male antheridium). Azolla has microscopic male and female gametophytes that develop inside the male and female spores. The female gametophyte ... , 1966), the microspore forms a male gametophyte with a single antheridium which produces eight swimming sperm. The barbed glochidia on the male spore clusters presumably cause them ...
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THAISZIA - JOURNAL OF BOTANY
... divided into three essential phases: (1) pollen imbibition and loss of exine; (2) elongation of male gametophyte and (3) development of pollen tube. Concerning the irregular pollen tube formation under in vitro ...
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Plant Diversity Syllabus
... Gametophyte Part 16. Lycophyta I. Lycopodium A. Mature sporophyte B. Reproduction 1. Gametophyte 2. Sporophyte embryo 3. Bulbils II. Selaginella A. Mature Sporophyte B. Reproduction 1. Female gametophyte 2. Male gametophyte ... II. Life history A. Staminate cone B. Ovulate cone C. Female gametophyte D. Pollination E. Male gametophyte F. Fertilization G. Embryo H. Representatives 1. Pinaceae a. Pinus ...
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Gymnosperms
... gametophyte. Now the male gametophyte begins to germinate from the pollen grain, i.e. pollen tube. Thus both male & female gametophytes develop within the ovule, and are nourished by nucellus. E. Male gametophyte ... nuclei. A mature male gametophyte then contains a pollen tube, 2 sperm nuclei, and several vegetative nuclei. F. Fertilization After about one year, the male & female gametophytes are ...
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Ohio Master Gardener Online Manual - GLOSSARY
... organisms that lack chlorophyll and include molds, rusts, mildews, smuts, mushrooms and yeast; singular, fungus. Gametophyte - the phase of a life cycle which has half the normal number of chromosomes. ... to make a dense cluster of branches and foliage. Pollen - the microspores that carry the male gametophyte of seed plants. Pollination - the transfer of pollen from the anther to the stigma. ...
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