Which best describes the purpose of bar graphs? a. they show changes over a period of time. b. they compare quantities for particular categories. c. they show the relationship among parts of a whole. d. they compare ranges as continuous data.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

This is the process of making a prediction based on the results of prior observations of similar events.