Where's a reflecting telescope uses to gather light a refracting telescope uses
a. a lens; a curved mirror
b. a curved mirror; a lens
c. prime focus; focal length
d. focal length; prime focus

How do you transfer mrna into codons ? i'm so confused : (

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above

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