Answer:
The answer Mitochondria and chloroplasts
Explanation:
Gastrointestinal epithelial cells. The epithelial cells that
like the gastrointestinal tract are typically HIGHLY PROLIFERATIVE. Cells that
line gastrointestinal tract. Cells proliferate and produce plasma cells. The
plasma cells bear antibodies with the identical antigen specificity as the
antigen receptors of the activated B cells.
If there is no antigen the blood group is 0 !!
extra info ; if both antigen - AB
<u>http://www.employees.csbsju.edu/ssaupe/biol121/chem_biol.htm</u>
that site should help
