What is believed to be the major evolutionary pressure in the development of closed circulatory systems?
A)transport of oxygen
B)transport of immune factors
C)transport of hormones
D)transport of glucose

Question

Quizplus · Accepted Answer

The development of a closed circulatory system enables efficient transport of oxygen to all parts of the organism, which is a major advantage in aerobic respiration. This increased efficiency likely provided a selective advantage in the evolution of closed circulatory systems.

What Is Believed to Be the Major Evolutionary Pressure in the Development