Question

was advantageous over an aquatic organism does a terrestrial organism have
with regard to obtaining oxygen tor respiration?​

Answer 1

Answer:

Terrestrial organisms breathe by using atmospheric oxygen whereas aquatic organism take oxygen dissolved in water. A terrestrial animal has over an aquatic animal with regard to obtaining oxygen for respiration. It's because the air in the atmosphere contains the maximum amount of oxygen.

Answer 2

Air contains about 21% oxygen while water has 1% oxygen in dissolved state. A terrestrial organism is able to get several more times oxygen than an aquatic animal. This is the reason that the terrestrial organism have the advantage of getting more oxygen that aquatic organisms.