Marine Biodiversity: A Legacy for the Future

Description: Marine Biodiversity: A Legacy for the Future
Number of Questions: 15
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Tags: marine biodiversity coral reefs ocean conservation marine ecosystems
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What percentage of the Earth's surface is covered by oceans?

  1. 50%

  2. 60%

  3. 70%

  4. 80%


Correct Option: C
Explanation:

Approximately 70% of the Earth's surface is covered by oceans.

Which marine ecosystem is known for its high biodiversity and structural complexity?

  1. Coral Reefs

  2. Mangrove Forests

  3. Seagrass Beds

  4. Kelp Forests


Correct Option: A
Explanation:

Coral reefs are renowned for their exceptional biodiversity and intricate structure, supporting a wide range of marine life.

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

  1. Providing Habitat and Shelter

  2. Filtering and Purifying Water

  3. Supporting Fisheries and Aquaculture

  4. All of the Above


Correct Option: D
Explanation:

Coral reefs serve multiple functions, including providing habitat and shelter for diverse marine life, filtering and purifying water, and supporting fisheries and aquaculture.

Which marine species is often referred to as the 'keystone species' of coral reef ecosystems?

  1. Sea Turtles

  2. Clownfish

  3. Coral Trout

  4. Parrotfish


Correct Option: D
Explanation:

Parrotfish are considered keystone species in coral reef ecosystems due to their role in controlling algal growth and maintaining the health of the reef.

What is the primary cause of coral bleaching, a major threat to coral reefs?

  1. Rising Sea Temperatures

  2. Overfishing

  3. Pollution

  4. Habitat Destruction


Correct Option: A
Explanation:

Rising sea temperatures, often associated with climate change, are the primary cause of coral bleaching, which can lead to coral death and reef degradation.

Which marine mammal is known for its intelligence and social behavior?

  1. Dolphins

  2. Whales

  3. Seals

  4. Sea Lions


Correct Option: A
Explanation:

Dolphins are renowned for their intelligence and complex social behavior, including cooperative hunting and communication.

What is the largest fish species in the world?

  1. Whale Shark

  2. Great White Shark

  3. Blue Marlin

  4. Swordfish


Correct Option: A
Explanation:

The whale shark is the largest fish species in the world, known for its gentle nature and filter-feeding habits.

Which marine invertebrate is known for its ability to change color and texture to camouflage itself?

  1. Octopus

  2. Squid

  3. Cuttlefish

  4. Jellyfish


Correct Option: A
Explanation:

Octopuses possess remarkable camouflage abilities, allowing them to change their color, texture, and shape to blend seamlessly with their surroundings.

What is the primary function of mangroves in coastal ecosystems?

  1. Providing Habitat and Nursery Grounds

  2. Protecting Shorelines from Erosion

  3. Filtering Pollutants and Sediments

  4. All of the Above


Correct Option: D
Explanation:

Mangroves provide multiple benefits, including habitat and nursery grounds for marine life, protection against coastal erosion, and filtration of pollutants and sediments.

Which marine organism is known for its ability to produce light through bioluminescence?

  1. Fireflies

  2. Glowworms

  3. Deep-Sea Fish

  4. Plankton


Correct Option: C
Explanation:

Many deep-sea fish species possess bioluminescent organs, producing light to attract prey, communicate with mates, or camouflage themselves.

What is the term used to describe the interconnectedness and interdependence of species within an ecosystem?

  1. Biodiversity

  2. Symbiosis

  3. Food Web

  4. Ecological Balance


Correct Option: D
Explanation:

Ecological balance refers to the interconnectedness and interdependence of species within an ecosystem, where the interactions between organisms maintain a stable and functioning system.

Which marine conservation initiative aims to protect large areas of the ocean from human activities?

  1. Marine Protected Areas (MPAs)

  2. Sustainable Fishing Practices

  3. Ocean Cleanup Projects

  4. Climate Change Mitigation


Correct Option: A
Explanation:

Marine Protected Areas (MPAs) are designated areas of the ocean where human activities are restricted or prohibited to conserve marine biodiversity and ecosystems.

What is the term used to describe the process of introducing non-native species into an ecosystem?

  1. Invasive Species

  2. Endangered Species

  3. Native Species

  4. Keystone Species


Correct Option: A
Explanation:

Invasive species are non-native species that have been introduced into an ecosystem, often through human activities, and can cause ecological harm by competing with native species or disrupting ecosystem processes.

Which marine pollution type is caused by the accumulation of plastic waste in the ocean?

  1. Oil Spills

  2. Chemical Pollution

  3. Plastic Pollution

  4. Noise Pollution


Correct Option: C
Explanation:

Plastic pollution refers to the accumulation of plastic waste in the ocean, posing a significant threat to marine life and ecosystems.

What is the term used to describe the process of restoring degraded marine ecosystems to their natural state?

  1. Marine Conservation

  2. Marine Restoration

  3. Marine Preservation

  4. Marine Management


Correct Option: B
Explanation:

Marine restoration involves actively restoring degraded marine ecosystems to their natural state, often through habitat restoration, species reintroduction, and pollution control measures.

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