Biology ยท General Awareness

Aquatic and Marine Biology

1,834 Questions

This hub covers key concepts in aquatic and marine biology, including fish anatomy, marine animal behavior, and commercial fisheries. These topics are essential for general science sections in various competitive exams. Use these resources to test your knowledge of diverse aquatic ecosystems.

Marine animal adaptationsCommercial fisheriesFish anatomyAquatic ecosystems

Aquatic and Marine Biology Questions

Multiple choice

Which of the following is a type of bird that is commonly found in estuaries?

  1. Osprey

  2. Eagle

  3. Hawk

  4. Owl
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Osprey is a type of bird that is commonly found in estuaries.

Multiple choice

What is the name of the unique type of fishing practiced in the backwaters of Kerala, where fishermen use Chinese fishing nets?

  1. Cast Net Fishing

  2. Trawling

  3. Gill Net Fishing

  4. Chinese Fishing Nets
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chinese Fishing Nets are a unique type of fishing practiced in the backwaters of Kerala, particularly in the Kochi region. These large, fixed nets are operated by skilled fishermen using a counterweight system, creating a visually striking and efficient method of fishing.

Multiple choice

Which of these species is not considered to be a keystone species?

  1. Sea Otter

  2. African Elephant

  3. Coral Reefs

  4. Honeybee
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Honeybee is not considered to be a keystone species, although it plays an important role in pollination.

Multiple choice

Which of these species is known for its long lifespan and slow reproductive rate?

  1. Giant Tortoise

  2. Greenland Shark

  3. Immortal Jellyfish

  4. Bowhead Whale
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Greenland Shark is known for its long lifespan, estimated to be over 400 years, and its slow reproductive rate, with females reaching sexual maturity at around 150 years of age.

Multiple choice

Which of the following is NOT a common type of marine life often encountered during scuba diving?

  1. Coral reefs.

  2. Fish.

  3. Sea turtles.

  4. Land animals.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Land animals are not typically encountered during scuba diving as they do not live in marine environments.

Multiple choice

What are the effects of fronts on marine life?

  1. Fronts can create areas of high productivity.

  2. Fronts can create areas of low productivity.

  3. Fronts can have no effect on productivity.

  4. Fronts can have both positive and negative effects on productivity.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fronts can have both positive and negative effects on productivity. On the one hand, fronts can create areas of high productivity by bringing together different water masses that are rich in nutrients. On the other hand, fronts can also create areas of low productivity by separating water masses that are rich in nutrients from each other.

Multiple choice

Which of the following is an example of a keystone species?

  1. Sea otter

  2. Gray wolf

  3. Coral

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sea otters, gray wolves, and coral are all examples of keystone species, which play a disproportionately large role in their ecosystems relative to their abundance.

Multiple choice

Which element is responsible for the formation of coral reefs?

  1. Calcium

  2. Magnesium

  3. Sodium

  4. Potassium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Calcium is essential for the formation of coral skeletons, which are composed primarily of calcium carbonate.

Multiple choice

Which element is responsible for the formation of marine snow?

  1. Calcium

  2. Magnesium

  3. Sodium

  4. Potassium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Calcium is essential for the formation of marine snow, which is composed of aggregates of organic matter, calcium carbonate, and other particles.

Multiple choice

Which of the following is a common type of canned fish?

  1. Tuna

  2. Salmon

  3. Sardines

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tuna, salmon, and sardines are all common types of canned fish.

Multiple choice

Which of the following is a type of fishing that uses a net to catch fish?

  1. Trawling

  2. Dredging

  3. Longlining

  4. Gillnetting
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gillnetting is a type of fishing that uses a net to catch fish. The net is set in the water and fish are caught when they swim into the net and become entangled in the mesh.

Multiple choice

Which of the following is a type of aquaculture that involves raising fish in cages in the ocean?

  1. Cage culture

  2. Pond culture

  3. Tank culture

  4. Raceway culture
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cage culture is a type of aquaculture that involves raising fish in cages in the ocean. This allows the fish to have access to natural seawater and sunlight, while still being protected from predators and other environmental hazards.

Multiple choice

Which of the following is a type of aquaculture that involves raising fish in tanks?

  1. Cage culture

  2. Pond culture

  3. Tank culture

  4. Raceway culture
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tank culture is a type of aquaculture that involves raising fish in tanks. This allows the fish to be kept in a controlled environment and protected from predators and other environmental hazards.

Multiple choice

Which of the following is a type of fishing that uses a net to drag along the bottom of the ocean?

  1. Trawling

  2. Dredging

  3. Longlining

  4. Gillnetting
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Trawling is a type of fishing that uses a net to drag along the bottom of the ocean. This method is used to catch a variety of fish species, including shrimp, cod, and flounder.

Multiple choice

What is the term for the process of raising fish in a controlled environment, using a raceway system?

  1. Cage culture

  2. Pond culture

  3. Tank culture

  4. Raceway culture
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Raceway culture is a type of aquaculture that involves raising fish in a controlled environment, using a raceway system. This system consists of a series of long, narrow tanks in which the fish are kept.