Flatworms also have a feature that the sponges and cnidarians do not, a middle layer of actual organized cells. Flatworms have three cell layers: an ectoderm, an outer covering like the other groups have; an endoderm, a lining of the digestive spaces somewhat like a cnidarians; and a mesoderm between the other two.With actual tissues protected like this, another evolutionary explosion of features happened.latworms have three cell layers: an ectoderm, an outer covering like the other groups have; an endoderm, a lining of the digestive spaces somewhat like a cnidarians; and a mesoderm between the other two. With actual tissues protected like this, another evolutionary explosion of features happened.
Distance, Gas Consumption and Emission Notes. Distance from Houston, TX to Grand Prairie, TX is 253Miles or 407 Km. You can get this distance about 3 hours 38 mins. If you want to planning travel with plane for 228 Miles or 367 Km, You can get this distance about 59 mins . A car with an average MPG will needs 11.71 gallons of gas to get the route between these points.
Grand Prairie, Texas won the award in the population group of 100,000-250,000. Grand Prairie is once again a finalist for the award in 2016. Grand Prairie offers some of the best parks and recreation venues in the country. Located near I-30 and Beltline Rd, Turner Park became Grand Prairie's Heritage (1st ever) Park back in the 1940s and today it features one of the top Disc Golf courses in North Texas.