What type of membrane provides lubrication to the , pericardial, and peritoneal cavities?

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

  the mississippians were considered to be  horticulturalists, which means they were