Flushing History. Household toilets made between 1980 and 1992 flushed the bowl utilizing the gravitational force of 2.5 to 3.6 gallons of water, which meant that the average homeowner used as much as 18.8 gallons of water daily.
Lesson Summary. A monocot is a type of flowering plant that is characterized by having a single cotyledon, trimerous flowers, and parallel leaf veins. Monocots are economically important as food sources for both humans and animals, and they grow in a variety of habitats, including the tropics.esson Summary. A monocot is a type of flowering plant that is characterized by having a single cotyledon, trimerous flowers, and parallel leaf veins. Monocots are economically important as food sources for both humans and animals, and they grow in a variety of habitats, including the tropics.
Monocots. Monocotyledonous leaves show a parallel venation and mostly are arrow or band-shaped. Stomata and other epidermal cells are almost always arranged in parallel arrays. These characterics are depicted in the photographs below of maize, papyrus and yucca.How monocotyle leaves develop is further explained in the section on monocot leaf formation.onocotyledonous leaves show a parallel venation and mostly are arrow or band-shaped. Stomata and other epidermal cells are almost always arranged in parallel arrays. These characterics are depicted in the photographs below of maize, papyrus and yucca.