Which aerodynamic effect primarily sustains avian soaring flight during periods of no flapping?

💡 Explanation

When a bird encounters a thermal updraft, the soaring flight is sustained through the exploitation of these rising air columns because buoyancy forces increase lift. Therefore, thermal updraft exploitation is the main mechanism rather than layer control, vortex behavior, or drag reduction, all of which play secondary roles in thermalling without continuous flapping.

• Which effect occurs when high oxygen concentration competitively inhibits Rubisco in C3 plants?
• Which outcome occurs when a grey seal undergoes prolonged diving in icy waters, inhibiting efficient oxygen delivery to vital organs?
• Which adjustment do fish employ when buoyancy imbalances occur due to swim bladder damage?
• Which outcome increases for predators when pursuing mobile prey in complex terrain?
• Which mechanism causes decreased photosynthetic efficiency when rubisco binds oxygen instead of carbon dioxide?
• Which outcome arises when atmospheric CO2 concentration decreases significantly, impacting C4 plants?