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.
Located less than one hour from Washington, D.C., Baltimore, and Gettysburg, the city of Frederick, Maryland is surrounded by mountain views, wineries, orchards and vibrant Main Street communities. Visitors can hike the Appalachian Trail, visit Maryland's largest brewery, and tour a battlefield all in one day. This is Frederick County, where hip meets historic every day. Featured Events