pollen sac
pollen sac The structure in seed plants in which pollen is produced. In angiosperms there are usually four pollen sacs in each anther; they contain the microspore mother cells. In gymnosperms variable numbers of pollen sacs are borne on the microsporophylls that make up the male cone.
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Plastid , plastid An organelle that is believed to have evolved from an autotrophic (see AUTOTROPH) endosymbiont early in plant evolution. Plastids occur in a… Gamete , Gamete
A gamete is a specialized reproductive cell . The cells usually have one half as many chromosomes in their nuclei as the majority of body cell… Anatomy Of Plants , Plants are the primary producers in Earth's ecosystem . Plants are autotrophic, meaning that they produce their own food (via photosynthesis), and as… Pollen , pollen, minute grains, usually yellow in color but occasionally white, brown, red, or purple, borne in the anther sac at the tip of the slender filam… Asexual Reproduction , Sexual reproduction involves the production of new cells by the fusion of sex cells (sperm and ova) to produce a genetically different cell . Asexual… Gametophyte , A gametophyte, or gamete-bearing plant, is one of the two multicellular phases that occur in alternation of generations. The gametophyte is the haplo…
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pollen sac