The Evolution of the Notochord in Chordates Permitted a More

question 29

True/False

The evolution of the notochord in chordates permitted a more complex embryonic development.

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Definitions:

Bronchial Tubes

The numerous smaller branches of the bronchus within the lungs, which serve to carry air further into the respiratory system.

Spent Air

Air that has been used in a process and is expelled, often devoid of oxygen or contaminated with pollutants.

Countercurrent Exchange

A mechanism whereby fluids flow in opposite directions to facilitate exchange of heat, gases, or other substances.

Fish Respiration

The process by which fish exchange gases with their environment, primarily through gills, to obtain oxygen and expel carbon dioxide.