Limiting reactant is the reactant that limits the amount of a product that can be formed in a chemical reaction. For example, suppose we have 4 bolts and 8 nuts. No matter how many nuts are there, we need only 4 nuts as we have got 4 bolts. Same thing about a chemical reaction. If the limiting reactant is fully consumed, the reaction will stop even if the other reactant still remains unreacted. That reactant is called excess reactant.
Creative Commons photo by Philip Bouchard. The pistil is a flower's female organ. Pistils are typically located in the center of the flower and are surrounded by petals, sepals and stamens. Some flowers, such as the sweet pea, have one simple pistil, while others, including larkspur, have more than five pistils.reative Commons photo by Philip Bouchard. The pistil is a flower's female organ. Pistils are typically located in the center of the flower and are surrounded by petals, sepals and stamens. Some flowers, such as the sweet pea, have one simple pistil, while others, including larkspur, have more than five pistils.
External Parts of a Flower Pistils. The female part of the plant draws the pollen onto the stigma when pollination occurs. At the base of the stigma, inside the plant, lies the flower's ovary with the eggs for reproduction. The pollen travels down the stigma to the ovary to meet the eggs of the flower in the same way sperm meets an egg in an animal.