Cell tracking shows that axolotl cells in a regrowing leg retain distinct roles. ... Salamanders have the ability to regrow amputated limbs. These cells then divide and differentiate into the tissue types needed. The adult tissues are reprogrammed to make these blastema stem cells
With the kisspeptin actions of releasing in direct to GnRH, it is expected that the receptors of the kisspeptin will be found in the hypothalamus. The hypothalamus' function is to coordinate the activities of the other system in the body in order to respond to different stimuli and to provide actions where it is needed in a person's life.
Antigens are proteins that are found on the surface of the pathogen and are viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles. Antigens are usually carried by proteins and polysaccharides, and less frequently, lipids but it also needs to be attached to a large carrier molecule which is usually a protein. When an antigen enters the body, the immune system produces antibodies against it. The Antigen stimulates the immune system to produce antibodies. YOUR WELCOME ;)
D is the correct answer since all others are highly unlikely.
