The male sperm cells are contained in pollen grains. The female egg cells are contained in the ovary. Sex among the flowering plants involves two separate but related activities: pollination and fertilization. Pollination is the transfer of pollen from the male organ of a flower to the female organ of a flower. The male organ known as an anther generates the pollen grains containing male genetic material. In most flowers, anthers are located at the tip of a stalk known as a stamen.
Also called Bravais lattice, crystal lattice, space lattice. Crystallography. an arrangement in space of isolated points (lattice points) in a regular pattern, showing the positions of atoms, molecules, or ions in the structure of a crystal. 5. Mathematics.
Sodium chloride crystal lattice. The lattice energy of a crystalline solid is usually defined as the energy of formation of the crystal from infinitely-separated ions, molecules, or atoms, and as such is invariably negative.he precise value of the lattice energy may not be determined experimentally, because of the impossibility of preparing an adequate amount of gaseous ions or atoms and measuring the energy released during their condensation to form the solid.