When cloning eukaryotic genes into bacteria for protein production, a copy of DNA that lacks introns must first be obtained. Introns are removed from primary RNA transcripts by the cell's own machinery, but the copy of the DNA lacking introns must be generated by a biotechnology method. This intron-free copy DNA (or cDNA) is generated by

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

What material did the moon come from?

Which factor that affects biodiversity?