This question was badly attempted by candidates. Very few candidates understood the term "aerobic muscular activity" and could not state the difference in colour between arterial blood and veinous blood.

The correct answers include:

Aerobic muscular activity is that which is performed utilizing energy derived from the presence of oxygen.

Difference in colour between Arterial blood and Veinous blood:

Arterial blood is bright red in colour while veinous blood is dark red in colour.