A ribosome is an organelle that functions like a cell's a. zygote b. grocery store c. factory d. gas station

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).

answer( increase) their individual contractile activity;

b) charles darwin i learned that last year!