When stained and visualized on the uv light box other gels have many bands and smears of DNA your gel has no bands smears or anything on it what may have caused these results

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land