Biology · General Awareness

Aquatic and Marine Biology

1,905 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 organisms, in a certain pond, are secondary consumers?

  1. Ducks and carnivorous fish

  2. Aquatic crustaceans and racoons

  3. Ducks and minnows

  4. Carnivorous fish and aquatic crustaceans

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ducks and carnivorous fish, in a certain pond, are secondary consumers. The primary consumers in a pond ecosystem are the herbivores like small fish, tadpole, etc., which feed on phytoplankton. These herbivores become the food of secondary consumers like some small fishes, crabs, frogs, etc. The secondary consumers then become the food of the tertiary consumers like large fish, turtles, etc.

Multiple choice

What is the most common length for White Sharks?

Directions: Read the given passage carefully and answer the following question.

The Great White Shark is the largest predatory shark, and is probably the most well-known and feared shark. The Great White Shark is gray or bluish above and white below. The largest Great White Sharks can reach lengths of 22 feet and weigh up to 5,000 pounds. Most are between 13 and 16 feet and weigh 1,500-2,400 pounds. The Great White Shark has massive teeth, which are positioned in rows and serrated. When the Great White Shark attacks, it bites its prey and shakes it head back and forth. The serrated teeth act as a saw and literally tear the victim apart. The Great White Shark often swallows many of its own teeth in an attack. The Great White Shark normally feeds on fish, seals, dolphins, porpoises, otters, and turtles. It is thought to locate its prey by electrosense and by smell. Like all sharks, Great White Sharks have special pores called Ampullae of Lorenzini, which enable them to detect the electromagnetic fields radiated by moving organisms. Great White Sharks can detect voltage as small as one half billionth of a volt.

  1. Between 15-18 feet

  2. Between 20-22 feet

  3. Between 13-16 feet

  4. Between 18-22 feet
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hint: "Most are between 13 and 16 feet... "

Multiple choice

What is not common about the Great White Sharks?

Directions: Read the given passage carefully and answer the following question.

The Great White Shark is the largest predatory shark, and is probably the most well-known and feared shark. The Great White Shark is gray or bluish above and white below. The largest Great White Sharks can reach lengths of 22 feet and weigh up to 5,000 pounds. Most are between 13 and 16 feet and weigh 1,500-2,400 pounds. The Great White Shark has massive teeth, which are positioned in rows and serrated. When the Great White Shark attacks, it bites its prey and shakes it head back and forth. The serrated teeth act as a saw and literally tear the victim apart. The Great White Shark often swallows many of its own teeth in an attack. The Great White Shark normally feeds on fish, seals, dolphins, porpoises, otters, and turtles. It is thought to locate its prey by electrosense and by smell. Like all sharks, Great White Sharks have special pores called Ampullae of Lorenzini, which enable them to detect the electromagnetic fields radiated by moving organisms. Great White Sharks can detect voltage as small as one half billionth of a volt.

  1. Finding a Great White Shark in 85 degrees (Fahrenheit) water

  2. Finding a Great White Shark that weighs 2,000 pounds

  3. Finding a 15 foot long Great White Shark

  4. Finding a Great White Shark hunting a porpoise
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is nowhere mentioned in the passage.

Multiple choice

What is not a normal part of the Great White Shark's diet?

Directions: Read the given passage carefully and answer the following question.

The Great White Shark is the largest predatory shark, and is probably the most well-known and feared shark. The Great White Shark is gray or bluish above and white below. The largest Great White Sharks can reach lengths of 22 feet and weigh up to 5,000 pounds. Most are between 13 and 16 feet and weigh 1,500-2,400 pounds. The Great White Shark has massive teeth, which are positioned in rows and serrated. When the Great White Shark attacks, it bites its prey and shakes it head back and forth. The serrated teeth act as a saw and literally tear the victim apart. The Great White Shark often swallows many of its own teeth in an attack. The Great White Shark normally feeds on fish, seals, dolphins, porpoises, otters, and turtles. It is thought to locate its prey by electrosense and by smell. Like all sharks, Great White Sharks have special pores called Ampullae of Lorenzini, which enable them to detect the electromagnetic fields radiated by moving organisms. Great White Sharks can detect voltage as small as one half billionth of a volt.

  1. Humans

  2. Dolphins

  3. Seals

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

This has not been mentioned in their diet.

Multiple choice

Which of the following statements is/are true about the Great White Sharks?

Directions: Read the given passage carefully and answer the following question.

The Great White Shark is the largest predatory shark, and is probably the most well-known and feared shark. The Great White Shark is gray or bluish above and white below. The largest Great White Sharks can reach lengths of 22 feet and weigh up to 5,000 pounds. Most are between 13 and 16 feet and weigh 1,500-2,400 pounds. The Great White Shark has massive teeth, which are positioned in rows and serrated. When the Great White Shark attacks, it bites its prey and shakes it head back and forth. The serrated teeth act as a saw and literally tear the victim apart. The Great White Shark often swallows many of its own teeth in an attack. The Great White Shark normally feeds on fish, seals, dolphins, porpoises, otters, and turtles. It is thought to locate its prey by electrosense and by smell. Like all sharks, Great White Sharks have special pores called Ampullae of Lorenzini, which enable them to detect the electromagnetic fields radiated by moving organisms. Great White Sharks can detect voltage as small as one half billionth of a volt.

  1. Great White Sharks swallow their own teeth during attacks.

  2. Great White Sharks employ different hunting techniques depending on the prey they are stalking.

  3. Great White Sharks can detect prey by smell or by magnetic field.

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

As all these features have been mentioned in the passage.

Multiple choice

Which of the following pairs of organisms is uricotelic?

  1. Birds and insects

  2. Reptiles and mammals

  3. Bony fishes and lizards

  4. Cartilaginous fishes and mammals

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The organisms that excrete nitrogenous wastes as uric acid in the form of pellet or paste with a minimum loss of water are called uricotelic animals, e.g. birds and most of the insects.

Multiple choice

If fish: scales, then man:?

  1. hair

  2. skin

  3. body

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

The relationship shows the characteristic covering of living creatures. The characteristic covering of man would is skin.

Multiple choice

Which words in the passage make it clear that the sharks are dangerous?

Directions: Read the passage and answer the question that follows.

The great white shark is one of the most recognisable sharks in the world. The only shark larger than a great white is the whale shark. Great white sharks have been found in each of the world's oceans. Even though they have been spotted in waters as shallow as three feet (one metre) deep, these sharks spend most of their time in deep coastal waters. One of the most noticeable features of the great white is the dorsal fin which rises out of the water when a great white swims near the surface of the  ocean. The fins on other side of the shark are called pectoral fins and they help to direct the shark closer to the surface or deeper into sea. The shark’s tail is powered by very strong muscles. It sweeps the tail side to side and can reach speeds of up to 15 miles per hour (24 kilometres per hour). White sharks have never been kept in captivity for longer than 7 months; so scientists are unsure how long they live. It is believed that their life span is almost 30 years. The great white shark is the most feared predator of the ocean, by people and by sea creatures alike!

  1. Most recognisable

  2. People and see creatures

  3. Feared predator

  4. Strong muscles
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It is clear that predator means that sharks attack or prey on other living beings.

Multiple choice

Which of the following statements is correct according to the passage?

Directions: Read the passage and answer the question that follows.

The great white shark is one of the most recognisable sharks in the world. The only shark larger than a great white is the whale shark. Great white sharks have been found in each of the world's oceans. Even though they have been spotted in waters as shallow as three feet (one metre) deep, these sharks spend most of their time in deep coastal waters. One of the most noticeable features of the great white is the dorsal fin which rises out of the water when a great white swims near the surface of the  ocean. The fins on other side of the shark are called pectoral fins and they help to direct the shark closer to the surface or deeper into sea. The shark’s tail is powered by very strong muscles. It sweeps the tail side to side and can reach speeds of up to 15 miles per hour (24 kilometres per hour). White sharks have never been kept in captivity for longer than 7 months; so scientists are unsure how long they live. It is believed that their life span is almost 30 years. The great white shark is the most feared predator of the ocean, by people and by sea creatures alike!

  1. Whale shark is the largest shark in the world.

  2. The shark’s favourite place is shallow waters.

  3. The shark’s fins help it to swim.

  4. Sharks have a long life.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All the other sentences are contradictory to the content or are not clear.

Multiple choice

What is the main idea in the passage?

Directions: Read the passage and answer the question that follows.

The great white shark is one of the most recognisable sharks in the world. The only shark larger than a great white is the whale shark. Great white sharks have been found in each of the world's oceans. Even though they have been spotted in waters as shallow as three feet (one metre) deep, these sharks spend most of their time in deep coastal waters. One of the most noticeable features of the great white is the dorsal fin which rises out of the water when a great white swims near the surface of the  ocean. The fins on other side of the shark are called pectoral fins and they help to direct the shark closer to the surface or deeper into sea. The shark’s tail is powered by very strong muscles. It sweeps the tail side to side and can reach speeds of up to 15 miles per hour (24 kilometres per hour). White sharks have never been kept in captivity for longer than 7 months; so scientists are unsure how long they live. It is believed that their life span is almost 30 years. The great white shark is the most feared predator of the ocean, by people and by sea creatures alike!

  1. Sharks and their habitat

  2. Sharks and their dreadful nature

  3. Sharks and their characteristics

  4. Sharks and their future
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The passage focuses on the characteristics of sharks.