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.
Buying a home in Fredericktown, PA. Fredericktown is a city in Washington County, Pennsylvania. Last year, 2 properties were sold for a median price of $49,000. Average price for a home in Fredericktown, PA is $49,000. The average property tax is $1,186 per year.
Dallastown is a borough in York County, Pennsylvania, United States. The population was 4,087 at the 2000 census. Dallastown is named after George M. Dallas of Philadelphia (VP of the Polk Administration) during the presidential campaign of 1844. Dallastown was incorporated April 1866. President Lyndon Johnson visited Dallastown in 1966 as part of the town's centennial celebration.