Coral Reefs: A Vital Habitat

Description: Coral Reefs: A Vital Habitat
Number of Questions: 15
Created by:
Tags: coral reefs marine biodiversity indian environment
Attempted 0/15 Correct 0 Score 0

What is the primary function of coral reefs in the marine ecosystem?

  1. Providing shelter and breeding grounds for diverse marine life

  2. Regulating ocean currents and tides

  3. Producing oxygen through photosynthesis

  4. Absorbing carbon dioxide from the atmosphere


Correct Option: A
Explanation:

Coral reefs serve as vital habitats for a wide range of marine organisms, including fish, invertebrates, and algae, providing shelter, breeding grounds, and food sources.

Which of the following is a major threat to coral reefs worldwide?

  1. Overfishing and unsustainable fishing practices

  2. Pollution from land-based sources

  3. Climate change and ocean acidification

  4. All of the above


Correct Option: D
Explanation:

Coral reefs face multiple threats, including overfishing, pollution, and climate change. Overfishing disrupts the delicate balance of the ecosystem, while pollution from land-based sources can introduce harmful chemicals and nutrients into the marine environment. Climate change and ocean acidification pose significant threats to coral health and survival.

What is the term used to describe the process of coral bleaching?

  1. Coral discoloration

  2. Coral whitening

  3. Coral stress response

  4. Coral death


Correct Option:
Explanation:

Coral bleaching refers to the process where corals lose their symbiotic algae, causing them to turn white or pale. This stress response is often triggered by elevated water temperatures, pollution, or other environmental stressors.

Which country in the Indian Ocean is home to the largest coral reef ecosystem in the world?

  1. India

  2. Sri Lanka

  3. Maldives

  4. Indonesia


Correct Option:
Explanation:

The Great Barrier Reef, located off the coast of Australia, is the largest coral reef system in the world, stretching over 2,300 kilometers.

What is the estimated economic value of coral reefs globally?

  1. Hundreds of billions of dollars

  2. Trillions of dollars

  3. Tens of billions of dollars

  4. Billions of dollars


Correct Option: B
Explanation:

Coral reefs provide various economic benefits, including tourism, fisheries, and coastal protection. Their estimated global economic value is in the trillions of dollars.

Which of the following is a common type of coral found in tropical waters?

  1. Staghorn coral

  2. Brain coral

  3. Fire coral

  4. Blue coral


Correct Option:
Explanation:

Staghorn coral, brain coral, fire coral, and blue coral are all common types of corals found in tropical waters around the world.

What is the primary source of food for most coral reef organisms?

  1. Plankton

  2. Algae

  3. Fish

  4. Coral polyps


Correct Option: A
Explanation:

Plankton, tiny organisms suspended in the water column, serve as the primary food source for many coral reef organisms, including fish, invertebrates, and coral polyps themselves.

Which of the following is a key factor in the formation of coral reefs?

  1. Shallow, warm waters

  2. Clear, nutrient-poor waters

  3. Strong ocean currents

  4. All of the above


Correct Option: D
Explanation:

Coral reefs typically form in shallow, warm waters with clear visibility and low nutrient levels. Strong ocean currents help distribute coral larvae and nutrients throughout the reef system.

What is the term used to describe the process of coral reproduction?

  1. Spawning

  2. Fragmentation

  3. Budding

  4. All of the above


Correct Option: D
Explanation:

Coral reproduction can occur through various methods, including spawning, fragmentation, and budding. Spawning involves the release of eggs and sperm into the water, while fragmentation and budding are asexual processes where new coral colonies form from broken fragments or buds.

Which of the following is a common threat to coral reefs in coastal areas?

  1. Sedimentation and pollution from land-based sources

  2. Overfishing and destructive fishing practices

  3. Climate change and ocean acidification

  4. All of the above


Correct Option: D
Explanation:

Coral reefs in coastal areas face multiple threats, including sedimentation and pollution from land-based sources, overfishing and destructive fishing practices, and climate change-related stressors such as ocean acidification and rising sea temperatures.

What is the term used to describe the symbiotic relationship between coral polyps and zooxanthellae?

  1. Mutualism

  2. Commensalism

  3. Parasitism

  4. Amensalism


Correct Option: A
Explanation:

The relationship between coral polyps and zooxanthellae is an example of mutualism, where both organisms benefit from the association. Zooxanthellae provide coral polyps with nutrients through photosynthesis, while coral polyps provide zooxanthellae with a protected environment and access to sunlight.

Which of the following is a major cause of coral reef degradation in the Caribbean Sea?

  1. Overfishing of herbivorous fish

  2. Pollution from agricultural runoff

  3. Tourism and recreational activities

  4. All of the above


Correct Option: D
Explanation:

Coral reefs in the Caribbean Sea face multiple stressors, including overfishing of herbivorous fish, pollution from agricultural runoff, and the impacts of tourism and recreational activities. These factors contribute to coral reef degradation and loss.

What is the term used to describe the process of coral restoration and rehabilitation?

  1. Coral transplantation

  2. Coral gardening

  3. Coral propagation

  4. All of the above


Correct Option: D
Explanation:

Coral restoration and rehabilitation involve various techniques, including coral transplantation, coral gardening, and coral propagation. These methods aim to restore damaged coral reefs and promote the growth and survival of coral colonies.

Which of the following is a key factor in the resilience of coral reefs to environmental stressors?

  1. Genetic diversity

  2. Species diversity

  3. Connectivity between reefs

  4. All of the above


Correct Option: D
Explanation:

The resilience of coral reefs to environmental stressors is influenced by various factors, including genetic diversity, species diversity, and connectivity between reefs. Genetic diversity provides the potential for adaptation to changing conditions, species diversity enhances ecosystem stability, and connectivity allows for the dispersal of larvae and genetic material between reefs.

What is the primary goal of marine protected areas (MPAs) in relation to coral reefs?

  1. To protect and conserve coral reef ecosystems

  2. To regulate fishing and other human activities

  3. To promote sustainable tourism and recreation

  4. All of the above


Correct Option: D
Explanation:

Marine protected areas (MPAs) aim to protect and conserve coral reef ecosystems by regulating fishing and other human activities, promoting sustainable tourism and recreation, and providing a safe haven for coral reefs to recover and thrive.

- Hide questions