corals will expel the algae zooxanthellae living in their tissues causing the coral to turn complete...........

Geography and Environment (CSC) Others

corals will expel the algae (zooxanthellae) living in their tissues causing the coral to turn completely white. This is called coral bleaching. Which of the following factors causes Zooxanthellae loss in corals?

1. An elevated concentration of chemical contaminants.

2. Warming of Sea Water due to climate change.

Which of the statements given above is/are correct?

1 only

2 only

Both 1 and 2

Neither 1 nor 2

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Explanation:

Both 1 and 2

When water is too warm, corals will expel the algae (zooxanthellae) living in their tissues causing the coral to turn completely white.
This is called coral bleaching.
When a coral bleaches, it is not dead. Corals can survive a bleaching event, but they are under more stress and are subject to mortality
The leading cause of coral bleaching is climate change. A warming planet means a warming ocean, and a change in water temperature—as little as 2 degrees Fahrenheit—can cause coral to drive out algae. Coral may bleach for other reasons, like extremely low tides, pollution, or too much sunlight.