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MCQs - 2026-03

891.
What is the symbiotic algae that corals expel during bleaching called?
A Phytoplankton
B Zooxanthellae
C Diatoms
D Dinoflagellates
892.
The long-term outlook for coral reefs is considered dire without:
A Increased ocean exploration.
B Significant global climate action.
C More artificial reef structures.
D Reduced international shipping.
893.
What are the recommended localized conservation efforts to help coral reefs recover?
A Increased industrial fishing.
B Reducing pollution and overfishing.
C Coastal development and construction.
D Introduction of invasive species.
894.
Which international body is calling for immediate action to address the coral reef crisis?
A World Health Organization (WHO)
B International Union for Conservation of Nature (IUCN)
C International Maritime Organization (IMO)
D World Tourism Organization (UNWTO)
895.
Besides impacting marine biodiversity, the degradation of coral reefs also affects:
A Global air quality.
B Fisheries, coastal protection, and tourism.
C Terrestrial agriculture.
D Continental drift.
896.
Coral reefs are vital habitats for approximately what percentage of all marine life?
A 5%
B 10%
C 15%
D 25%
897.
Which of these is NOT mentioned as a severely affected reef system?
A The Great Barrier Reef
B Caribbean reefs
C Reefs in Southeast Asia
D Red Sea reefs
898.
Which of the following is a major contributing factor to the current global coral reef bleaching event?
A A La Niña event
B A lingering El Niño event and climate change-induced ocean warming
C Decreased solar activity
D Increased volcanic activity in oceanic regions
899.
What causes coral bleaching?
A Increased ocean acidity.
B Elevated sea surface temperatures causing corals to expel symbiotic algae.
C Overfishing of coral predators.
D Pollution from plastic waste.
900.
What environmental phenomenon has intensified globally in March 2026, severely impacting coral reefs?
A Ocean acidification
B Coral reef bleaching
C Marine heatwaves
D Increased ocean salinity