Which of the following molecules or ions is polar? #2

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.

What lessons does the history and study of the periodic table offer to other fields of science, and the pursuit science more generally

Gene expression control that occurs during the generation of rna is a. controlled at transcription b. control before transcription c. controlled after transcription d. controlled after translation