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

Scientists are not sure about the life span of sharks due to

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. lack of application

  2. lack of research on marine life

  3. lack of adequate time

  4. lack of observation

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

It is clear that scientists have never observed sharks for longer periods.

Multiple choice

Why have sharks not been kept in captivity for longer than 7 months?

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. Because they are dangerous predators

  2. Because they traditionally live in deep waters

  3. Neither (1) nor (2)

  4. Both (1) and (2)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The reason is not given in the passage.

Multiple choice

Forelle

  1. Salmon

  2. Trout

  3. Bass

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

Forelle is the German word for trout. It is a freshwater fish.

Multiple choice

Just keep swimming.

  1. Jaws

  2. Surf's Up

  3. Finding Nemo

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

The phrase 'Just keep swimming' is Dory's mantra in the Pixar film Finding Nemo.

Multiple choice

🐋, I hope so.

  1. Fish, I hope so.

  2. Well, I hope so.

  3. Whale, I hope so.

  4. Aquatic, I hope so.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The whale emoji is used as a pun for the word 'Well', making the phrase 'Well, I hope so'. The other options are incorrect interpretations of the pun.

Multiple choice biology organization of life

Most vertebrates can maintain a constant internal osmolarity different from the surrounding medium, except

  1. Myxine

  2. Sharks

  3. Bony fishes
  4. Both $(A)$ & $(B)$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Most vertebrates are osmoregulators, but Myxine (hagfish) are osmoconformers, and sharks are osmoconformers that maintain internal osmolarity near that of seawater using urea. Since both A and B are correct examples of non-osmoregulating vertebrates, D is the correct choice.

Multiple choice

What "crystal critters" inhabit Crait?

  1. Vulptex

  2. crystal critter

  3. Tauntauns

  4. ICo-Foxenomorph
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The crystalline fox-like creatures that inhabit the salt planet Crait are known as Vulptex (plural: vulptices).

Multiple choice

What am I? I have scales or rough, dry skin.

  1. mammal

  2. fish

  3. insect

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

Reptiles are defined by having dry, scaly skin that helps them retain moisture. Mammals have fur or hair, fish have scales but live in water, and insects have exoskeletons.