Which class of Phylum Chordata includes animals with feathers and porous, lightweight bones?

Which measure of an earthquake depends on how close you are to the focus?

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

Which strand is synthesized towards the replication fork