B. Steroid hormone
This is because most hormones are steroids, that send long distance signaling throughout your body.
Thirty-eight because the chromosome pairs are 19 and therefore, no. of chromosome will be 38.
People who use complex tools like plows, irrigation, and fertilizers to grow domesticated plants are called farmers, it is a large scale activity and it´s use to obtain food from the earth, we also have horticulture, does not require hundreds or thousands of acres of land, horticulture is also important, but is more limited to the domestic and individual context, and finally it is much cheaper because it is not done at large scales like the Agriculture.
