Cindy conducted an experiment for her science class. she repeated the experiment three times. each time, cindy got a different result. what should cindy do next? a. add another variable into the experiment and repeat the experiment a fourth time. b. stop trying to test the current hypothesis and find a new hypothesis to test. c. go over the experimental procedure to make sure there is only one variable. d. use the results obtained from the first experiment to draw conclusions.

Dominant over the mutant vermilion (bright red) allele. a homozygous wild-type female fly is mated with a vermilion male fly. predict the eye colors of f1 and f2 generations. (assume that the f1 flies are allowed to interbreed to produce the f2 generation.)

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

During convection, less dense fluid rises and denser fluid sinks.