Which risk greatly increases when the alula feather stalls during thermal soaring?

💡 Explanation

Stalling of the alula reduces airflow control and lift via boundary layer transition, because lift abruptly decreases without the alula's smooth air reattachment: Therefore, uncontrolled roll occurs, rather than muscular fatigue, changes in VO2, or oxygen uptake, which are slower processes.

• Which phenomenon results when legume nodule enzymes denature?
• Which outcome occurs when a fish's opercular valve fails to fully close during ventilation?
• Which outcome occurs when coastal mangrove stomata close during saltwater inundation?
• Which mechanism optimizes soaring flight in vultures encountering upward air currents?
• Which sensory outcome occurs when a migrating bird encounters an unusually strong local magnetic anomaly?
• Which consequence results when coral bleaching causes algal expulsion?