What is the primary physiological mechanism by which Avicennia marina mangroves cope with high salt concentrations in seawater?
Answer and explanation
Correct answer: B. Excreting excess salt crystals through specialized leaf glands
- Step 1: Understand the halophytic adaptations of the grey mangrove tree.
- Step 2: Avicennia marina absorbs seawater through roots and excretes excess salt via microscopic salt-secreting glands on the surface of its leaves, leaving visible crystals.
Answer
Excreting excess salt crystals through specialized leaf glands.
Why not the others: Mangroves cannot meet water demands via atmospheric vapor alone; sodium chloride cannot be converted into carbohydrates; roots filter some salt but leaf secretion is the primary excretion pathway.
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