Buffer zones a. can regulate the acidity of aquatic ecosystems b. increase erosion rates c. are set up around natural resource areas d. all of the above

Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before

The language and religion of france developed from which people? a. the franks b. the gauls c. the anglo-saxons d. the romans

Why slip off slopes are found on the inside of meanders? why river cliffs are found on the outside of meanders?