Sympatric speciation is the formation of two or more descendant species from a single ancestral species all occupying the same geographic location. Often-cited examples of sympatric speciation are found in insects that become dependent on different host plants in the same area.
Rice noodles are a type of semi-transparent pasta made from rice flour and water. Most are very long and thin, but you can also find flat rice noodles, as well. These noodles cook notably fast and can actually turn to mush if cooked for too long, so it's important to know how to cook them properly.
Wheat flour noodles are the most common Chinese noodle and come in many varieties. Made from wheat flour, water and sometimes salt, they can be made with or without eggs. Available fresh or dried, they may be white or yellow colored. They can be shaped thin like spaghetti, or very thick, like these here.