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← Nature & AnimalsWhich consequence results when thermal stress disrupts corals' intracellular pH regulation?
A)Enhanced structural rigidity of coral skeletons
B)Increased photosynthetic output by zooxanthellae
C)Coral bleaching due to symbiotic expulsion✓
D)Reduced susceptibility to viral infections
💡 Explanation
Coral bleaching occurs due to expulsion of zooxanthellae caused by thermal stress; intracellular pH decreases, hindering the Calvin cycle. Therefore, the symbiotic relationship collapses, rather than bolstering the coral structure or defense because photosynthesis is damaged.
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