Isoantigens are -: (A) Found in some but not all members of species, (B) Found in some but not all members of species, (C) Occurs in different biological species, class and kingdoms, (D) All individuals in a paicular species
Answer is B. Isoantigens are antigens found in some but not all members of a species. A species may be grouped depending on the presence of different isoantigens in its members. The best example is human erythrocyte antigens, based on which individuals can be classified into different blood groups. Reference:athanarayan & paniker's 9th edition, pg no: 89 <\p>