An inactive(dead) version of the disease is given, so that the body can build antibodies but now suffer from the symptoms
Answer:
Well , I think the answer is B
This represents a closed system,and one benifit is that the risk of passing disease between other species is lower than in open system
But still I prefer you to check it out in your book
Answer:
The one I know is plant cell has no cell wall while animal cell have cell wall
