Biology · 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 zoology earthworm structure of earthworm earthworm - morphology, integumentary system , respiration and nervous system adaptations

Which of the following animals body shows bilateral symmetry?

  1. Star fish

  2. Jelly fish

  3. Earthworm

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

Bilateral symmetry means the body can be divided into identical left and right halves along a single plane. Among the choices, earthworms exhibit bilateral symmetry, whereas adult starfish and jellyfish show radial symmetry, and sponges are mostly asymmetrical.

Multiple choice zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

Which has no skeleton?

  1. Cockroach

  2. Mosquito

  3. Butterfly

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

Jellyfish are the major non-polyp form of the individuals of the phylum Cnidaria. They are free-swimming marine animals consisting of a gelatinous umbrella-shaped bell and trailing tentacles. They do not possess a proper skeleton.
Therefore, the correct answer is option D.

Multiple choice zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

Select the wrongly paired one from the following.

  1. Flats worms - Tape worm and liver fluke

  2. Sea walnuts - Hydra and Obelia

  3. Homoiothermous - Aves and mammals

  4. Incomplete digestive system - Platyhelminthes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

a) Tape worm and liver fluke belongs to phylum platyhelminthes, having dorsoventrally flattened body hence are flat worms.

b) Hydra and Obelia are cnidarians belongs to phylum coelenterata and exhibit two basic body forms i.e, polyp and medusa. Sea walnuts belongs to phylum ctenophora and bears comb plates.
c) Homiothermous are warm blooded animals which maintains a constant body temperature and includes aves and mammals.
d) Platyhelminthes have incomplete digestive system as they absorb nutrients from the host directly through their body surface.
So, the correct answer is option B.

Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

Most animals that live in deep oceanic water are 

  1. Primary consumers

  2. Secondary consumers

  3. Tertiary consumers

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

Most animals that live in deep oceanic water are detritivores. They are also called as scavengers. Most of them living in deep ocean include crustaceans and polychaetes.

Thus, the correct answer is option D.

Multiple choice

What class of animal is a newt?

  1. reptile

  2. amphibian

  3. crustacean

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

A newt is a type of salamander, which belongs to the class of animals known as amphibians.

Multiple choice

Mammal is to lungs as fish is to ________

  1. scales

  2. fins

  3. gills

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

Mammals use lungs to breathe air, while fish use gills to extract oxygen from water. This is a standard biological analogy.

Multiple choice

Which of the following is a reptile?

  1. sea horse

  2. toad

  3. gecko

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

A gecko is a reptile, which is a cold-blooded vertebrate with scaly skin. Sea horses are fish, toads are amphibians, and crabs are crustaceans.

Multiple choice general knowledge resources of india and world animal husbandry and fishery green and white revolution agriculture in indian economy

Name a type of fish carrying genes only from its father in the nucleus of its cells___________.

  1. Squalis alburnoides

  2. Salmo salar

  3. Xiphias gladius

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

Squalis alburnoides is a hybrid fish species that exhibits a unique form of reproduction where the paternal genome is often exclusively expressed or retained in certain lineages.

Multiple choice general knowledge resources of india and world animal husbandry and fishery green and white revolution agriculture in indian economy

Which of the following are major fishes of Southern Europe and Mediterranean Sea?

  1. Sardine and Anchovy

  2. Tuna and Cod

  3. Right Whales

  4. Brisling and Caplen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tuna and Cod are significant commercial species in the Mediterranean and Southern European waters, often targeted by large-scale fishing fleets.

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

The marine organisms showing spinning movements and responsible for killing fishes by producing toxins belong to the following kingdom of Whittaker

  1. Fungi

  2. Animalia

  3. Monera

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

Dinoflagellates are marine protists known for their rapid spinning movement. Certain species, such as those causing red tides, produce potent toxins that can kill marine life, including fish.

Multiple choice botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

Mangrove roots are a habitat of

  1. Fish

  2. Echinoderms

  3. Crabs and Oysters

  4. Cuttlefish and Octopus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mangrove is an ecosystem that connects sea and land.  Mangrove trees are adapted to survive salt water. Mangroove roots are a habitat of fish. The roots provide structure and habitat for organisms such as fish to grow upon and hide behind. Oysters, mussels, sponges, snails, small fish are examples of fish that lives around mangrove roots.

Thus, the correct answer is 'Fish.'