Daphnia are small water fleas that are relatively transparent and thus their heart beat can be monitored under a microscope. In a series of experiments, 3 different Daphnia fleas were exposed to either water (control) or dilute solutions of different drugs (shown in the table below). After a brief period of equilibration after exposure to the drug, the heartbeat of the flea was counted for 1 minute and recorded in the table below: Control Adrenaline Nicotine Alcohol Caffeine Flea 1- 50 80 30 27 38 Flea 2- 28 74 35 28 24 Flea 3-- 55 64 34 27 50

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

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; cnidarians;

answer diabetes mellitus;