As a result, the price spread between premium and regular unleaded has spiked to a record high above 40 cents a gallon, as the chart below makes clear. View photo. Price difference between premium & regular unleaded gasoline per gallon (1994-2015).The fat premium thatâs now being demanded for premium is one more reason for most drivers to stick to plain old 87-octane regular â which is perfectly fine for the vast majority of recent-model cars.s a result, the price spread between premium and regular unleaded has spiked to a record high above 40 cents a gallon, as the chart below makes clear. View photo. Price difference between premium & regular unleaded gasoline per gallon (1994-2015).
Submit. The term angiosperm is used to identify all the flowering plants in the world. As a flowering plant, the water lily (Nymphaeaceae) is an angiosperm. About 80 percent of all the plants on earth are angiosperms.
Defining Characteristics. The term angiosperm derives from two Greek words: angeion, meaning vessel, and sperma, meaning seed.. The angiosperms are those plants whose seeds develop within a surrounding layer of plant tissue, called the carpel, with seeds attached around the margins.This arrangement is easily seen by slicing into a tomato, for example.owever, some current studies suggest that endosperm is not unique to angiosperms. Angiosperm flowers are generically characterized by having four whorls, or sets of organs: sepals, petals, stamens, and carpels.