(NO LINKS) Nick hypothesizes that wax has a higher melting point than chocolate. How can Nick test his hypothesis? A.
Measure the volume and weight of samples of wax and chocolate and calculate their densities.
B.
Heat equal masses of wax and chocolate and measure their temperatures when they start to melt.
C.
Use Mohs Hardness Scale to test how easily wax and chocolate can be scratched.
D.
Heat samples of wax and chocolate and use a stopwatch to time how long it takes until they start to melt.

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on the planet jupiter, the acceleration due to gravity is approximately 26 m s2 , roughly 2.7 times the acceleration due

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).