The grouping o( blood is based on substances called

A. antibodies

B. antigens

C. antitoxin

D. enzymes

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The amount of blood in a normal man is about
  2. The disease in which blood clotting does not take place is known as
  3. Pacemaker is the
  4. If a father has blood group A and the mother has blood group 0, which one of the blood groups may be…
  5. The radicle of the seeding always grows
  6. Phonoreceptor refers to the perception of
  7. The acid that is secreted in the stomach is
  8. Who first observed the plasma membrane?
  9. In movable joints the tips of the bones are covered with
  10. The heart of the human embryo starts beating in the _____ week of its development.
  11. What are the symptoms of 'Pellagra'?
  12. The external ears of man are intended for
  13. The human heart is
  14. Which one of the ecosystems Is the largest in the world?
  15. Which of the following is NOT a viral disease?
  16. Hormone promoting maleness in flowering plants is
  17. Organisms which synthesise their own food are called
  18. Injection of insulin causes
  19. Dr Khorana's work relates to
  20. The cavities of the brain are filled with
  21. The grey matter of the brain is so coloured because of the concentration of
  22. Which one of the following is caused by the expression of a recessive gene present on sex chromosome?
  23. Digestion of proteins starts in the
  24. The disease in which blood clotting does not take place is known as
  25. Plants grown in darkness show
  26. Aphids are
  27. The two minerals required to keep teeth and bones intact and in good condition are
  28. Which one of the following animals stores water in the intestine?
  29. The theory that all animals and plants are made up of cells and they could arise only from pre-existing…
  30. Edward Jenner to find out the efficacy of vaccination used