Below is a list of test scores for the ninth grade.

How often do neap tides occur? a. about once a month b. about twice a month c. about once a year d. about twice a year

The chart below matches messenger rna codons with amino acids. a dna strand has the sequence of bases, aat. according to the chart, the corresponding messenger rna codes for which amino acid?

Which of the following must happen in order for productivity to increase? a. production levels remain unchanged while inputs increase. b. production levels rise while inputs decrease. c. production levels fall while inputs increase.