Your mother is worried because she heard that the chicken pox vaccine your baby brother is going to receive is weakened form of the virus that causes the disease. how do you explain to her that being injected with the disease will actually protect your brother? !

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.