Carbon monoxide has a density that is about 97% that of air under normal room temperature. So, to answer the question, no, it is lighter than air. You would think, then, that it would rise. In real-world conditions, there are a lot of forces that cause the CO to mix rather completely into the air.
Growth Hormones. Growth Hormones are responsible for the development function of the entire body. Growth Hormones are peptide hormones which encourages growth and cell regeneration in both humans and animals.
HGH stimulates growth as it generates the production of cartilage found in your epiphyseal plates. Estrogen, as well several other hormones, replaces the cartilage with bone (edochondrol ossification), which ends the growth phase. Before this stage begins, HGH will help you grow taller before the stages of growth ends.