Which is the best definition of genetic engineering? variation in an organism's traits by natural variation of its dna modification of an organism's characteristics by maintaining its dna full removal of an organism's characteristics by altering its dna changing an organism's characteristics by manipulating its dna

Modern whales developed their traits through natural selection what occurs during the process of natural selection

Drag each label to the correct location in the equation. not all tiles will be used. the density of mercury is 13.6 grams per cubic centimeter. complete the steps for converting 13.6 g/cm3 to kg/m3. (1 kg = 1,000 g, 1 m3 = 106 cm3)

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere