What is responsible for identifying foreign invaders and remains in the system for a long period of time.
a. red blood cells
b. axons
c. antigens
d. lymph nodes

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass

Compare and contrast cladistics and phylogeny. what are their advantages and disadvantages? which is the most useful in understanding how an organism developed into its current form? which concept most strongly supports your opinion about the origin of any given organism?

Name the organs of humanelemintary canal.