Progesterone is a hormone released by the corpus luteum in the ovary. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy. It may also be involved in the growth of certain cancers.
The hepatitis B and the human papillomavirus (HPV) vaccines are made this way. The vaccine is composed of a protein that resides on the surface of the virus. This strategy can be used when an immune response to one part of the virus (or bacteria) is responsible for protection against disease.Jun 28, 2016
The answer is prominence because when Flame-like gas eruptions are anchored to the sun's photosphere and extend outward in an arch-like shape all the way into the corona, which is the sun's hot outer atmosphere.
