Sandy and her brother have the same parents, but they have different eye colors. What makes the difference in the expressed trait for eye color in each sibling? A. The difference in sequence of their DNA for the gene for eye color
B. The different length of the DNA for the gene for eye color
C. A mutation must have occured in one of the children's DNA
D. Eye color can change based on environmental factors

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

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes

What type of reaction is photosynthesis