question_answer 18)

  It is known that exposure to carbon monoxide is harmful to animals because (a) it reduces  transport                                      (b) it reduces transport (c) it increases transport                                     (d) it increases transport

Answer:

                  (b) Haemoglobin consist of a protein globin and pigment here. The four portion of iron in name combine with molecule of oxygen. It is an easy reversible reaction to form oxyhaemoglobin Whereas, the complex formed by the reaction of carbon monooxide and haemoglobin is incredibly strong As a result of this strong between the haemoglobin and carbon monooxide the haemoglobin looses its affinity to oxygen thus may lead to choking or even death.