Which mechanism contributes to cavitation events in tall trees when soil water becomes limited?

💡 Explanation

Cavitation arises due to interrupted water columns in xylem elements; tension increases with drought because the cohesion-tension mechanism creates negative pressure, therefore air enters the xylem and breaks the continuous water column, rather than continuous unbroken cohesion from roots to shoots.

• Which mechanism causes tissue swelling, called edema, in freshwater fish due to osmoregulatory failure?
• Which outcome reduces blood oxygen saturation under increased activity in fish?
• Which outcome occurs when guard cell turgor pressure drops excessively in plant leaves during drought conditions?
• Which structural consequence occurs due to asymmetrical barbs in avian flight feathers during wind shear?
• Which condition limits photosynthetic rate when rubisco enzyme concentration in leaf cells remains constant?
• Which consequence occurs when the gut microbiome is diminished?