Q1. Describe androecium and gynoecium briefly.
Q3. How microspore germinate into male gametophyte?
Q4. Describe the formation of triploid endosperm nucleus briefly.
Answers
Q1. The Androecium is the name given to a group of stamens. Each stamen is made up of a filament and anther at the top of it. The anthers are lobed structures that produce pollen which contains the male gamete.
The Gynoecium is the female reproductive organ in a flower.
Q3. In seed plants the Microspores develop into pollen grains each containing a reduced, multicellular male gametophyte. Each of the microsporocytes in the microsporangia undergoes meiosis, producing four haploid microspores. These develop into pollen grains, each consisting of four cells and a pair of external air sacs.
Q4. In most flowering plants, the central cell contains two haploid nuclei, which fuse prior to or at fertilization. The fusion of this homodiploid nucleus with the sperm nucleus results in a Triploid Primary Endosperm Nucleus with two maternal and one paternal genome complements.