A specimen is viewed with a compound light microscope with the 20X objective lens in place and a 2X eyepiece lens. What is the total magnification of the specimen?

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

its temperature is increasing. this causes molecular vibrations to increase.

you know they are heterozygous for a trait because they have it as jj or jj.

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).