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Reproduction in Plants
What is a mature ovary of a flowering plant called
Fruits[ edit ] A fruit is the ripened ovary or ovaries—together with seeds —from one or more flowers. The fruits of a plant are responsible for dispersing the seeds that contain the embryo and protecting the seeds as well. In many species, the fruit incorporates some surrounding tissues, or is dispersed with some non-fruit tissues. Parts of the ovary[ edit ] Locules are chambers within the ovary of the flower and fruits. The locules contain the ovules seeds , and may or may not be filled with fruit flesh. Depending on the number of locules in the ovary, fruits can be classified as uni-locular unilocular , bi-locular, tri-locular or multi-locular. Some plants have septa between the carpels; the number of locules present in a gynoecium may be equal to or less than the number of carpels, depending on whether septa are present.
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How to Identify Six Plant Families Using Their Flowers
Flowering plants-3 Heterosporous male - diploid sporophyte anther with microsporangium containing microspore mother cells; through meiosis they produce haploid microspores which germinate within the anther sac to produce immature male gametophytes pollen grains containing tube nucleus and generative cell 2 sperm nuclei female - diploid sporophyte ovule within ovary has megasporangium containing megaspore mother cells; through meiosis they produce megaspores which germinate into female gametophyte containing egg and 2 polar nuclei Double fertilization Stages of fertilization - 2 pollen grain germinates on stigma forming pollen tube growing to the ovary; the two haploid sperm travel down the tube to the ovary where one sperm nucleus fertilizes the haploid egg forming a diploid zygote and the other sperm nucleus unites with the two polar nuclei forming a triploid endosperm nucleus which grows into the endosperm the fertilized egg becomes a zygote that grows into a plant embryo. These fleshy modified leaves store food materials that are used by the germinating seed include carbohydrates, proteins, and lipids. The origin of the stored food is provided, at least initially, by the endosperm. There are two groups of flowering plants that are differentiated by the number of cotyledons that develop in the young embryo:
He enjoys reading about anything related to plants during his spare time. The plant kingdom is composed of a wide variety of plant species. It can be subdivided into vascular and non-vascular plants. Vascular plants are characterized by having specialized tissues xylem and phloem to transport food and minerals, unlike non-vascular plants.