Type O-negative blood does not have any antigens (so yes, it lacks all 3). It is called the "universal donor" type because it is compatible with any blood type
(not sure if this is what you need
Where are the "following structures"?
C) homeostasis is the answer!!
Answer:
The differences in characteristics between individuals of the same species is called variation . Some variation is passed on from parents to offspring, via genes during reproduction. ... Some variation is the result of differences in the surroundings, or what an individual does. This is called environmental variation.
