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 biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

Term vertebrate and invertebrate are given by 

  1. John Ray

  2. Linneaus

  3. Lamark

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

Lamarck, the French naturalist was the one who introduced the taxonomic distinction between vertebrates and invertebrates.
John ray was the first to give the definition of 'species'.
Carl Linnaeus gave the 'binomial nomenclature' for living beings.

Leuckart is remembered for his work in parasitology, particularly research regarding tapeworm and trichinosis. 
So, the correct answer is option C.

Multiple choice zoology frog introduction to reproduction reproductive system in frog frog - digestive system, circulatory system, excretory system and reproductive system

Tadpole larva of frog feed upon?

  1. Yolk sac

  2. Zooplanktons

  3. Protozoa

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

Tadpole larva has a rudimentary mouth which is not highly developed. Thus frog tadpole is a herbivore, feeding on relatively simpler food found available in the aquatic systems, such as Zooplanktons. Upon growth, tadpole larva undergoes metamorphosis where the mouth and internal organs will be rearranged to develop an adult carnivorous lifestyle.


Thus, the correct option is "(B) Zooplanktons".

Multiple choice zoology frog introduction to reproduction reproductive system in frog frog - digestive system, circulatory system, excretory system and reproductive system

Frog reproduces

  1. In water

  2. On trees

  3. In sand

  4. On lotus flowers in water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Frog reproduces in water. They are oviparous and they lay eggs in water which is fertilised outside the body of the frog. In order to make sure that the sperm reaches the eggs, the male and female get into a mating posture called amplexus. so, the correct answer is option A.

Multiple choice rivers - means of livelihood evs

Hilsa ilisha is the scientific name of which fish?

  1. Pulasa

  2. Rohu

  3. Pomfret

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

Hilsa ilisha is the scientific name for the fish commonly known as Hilsa or Pulasa in the Godavari region.

Multiple choice biology habits and habitats of some important animals behavioural science ethology animal behaviour

How many animal in the list given which is ammoniotelic in nature?
Aquatic insect, fresh water bony fish, frog, birds, reptiles, spider, marine bony fish, crocodile.

  1. One

  2. Two

  3. Three

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

Ammoniotelic animals excrete nitrogenous waste primarily as ammonia. Among the list, only aquatic insects (some) or specific fish fit, but typically, only one group is considered strictly ammoniotelic in this context.

Multiple choice botany types and parts of plants plant life cycle alternation of generations life span

Which of the following organisms breeds only once in life time

  1. Bamboo

  2. Oysters

  3. Pelagic fishes

  4. Birds

  5. Mammals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Bamboo flower only once in their life, generally after 50 - 100 years. They produce a large number of fruits and die. They rely on seed to perpetuate themselves. 
Oysters usually reach maturity in one year. 
Birds mate only once per year.
Mammals breeding cycle comes once a month.
Pelagic fishes is a seasonal breeder.
So, the correct answer is option A.
Multiple choice chemistry air and water pollution control smoke, dust and other air pollutants, acid rain air pollutants and its effects air and air pollution

What is the odour of $H _2S$?

  1. Rotten fish

  2. Rotten egg

  3. Pungent

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

Hydrogen sulfide is the chemical compound with the formula $H _2S$. It is a colorless chalcogen hydride gas with the characteristic foul odor of rotten eggs. It is very poisonous, corrosive, and flammable.

Option (B) is the answer.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Cleidoic egg is an adaptation for

  1. Aquatic life

  2. Marine life

  3. Terrestrial life

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

Cleidoic eggs are laid by terrestrial animals like reptiles and birds. The egg is surrounded by a hard porous shell. Gaseous diffusion occurs through porous shell. Egg of aquatic animals is covered by a jelly coat and not by a hard shell. The shell in cleidoic eggs protects the developing embryo and also makes available an aquatic environment for development. The yolk of an egg is a source of nutrition for developing an embryo.

So, the correct answer is option C.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Reptile and bird eggs are

  1. Macrolecithal

  2. Oligolecithal

  3. Mesolecithal

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

Reptiles and birds are terrestrial animals. They lay large yolk-rich eggs which are covered with a porous shell. As the eggs are rich in yolk they can support the development of an embryo. Hence, embryogenesis occurs outside the body of the animal inside the egg. Such yolk-rich eggs are called as macrolecithal eggs.

So, the correct answer is option A.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Animals which give birth to young ones are called as

  1. Amphibious

  2. Oviparous

  3. Triploblastic

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

Amphibious are the animals that can live on water as well as on land.
Oviparous are the animals that lay eggs.
Triploblastic describes the animal having a body composed of three embryonic cell layers as the ectoderm, mesoderm, and endoderm.
Viviparous are animals that give birth to live young one that has developed inside the body of the parent.

So, the correct answer is option D.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

The eggs of frogs do not have shells for protection, yet they are safe in water. How?

  1. They are covered and embedded in a jelly like strip

  2. They are covered with bark

  3. They are covered with yolk

  4. Both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • The female frog covers the eggs with a jelly-like substance that causes the eggs to float to the water's surface and also protects from any damage.

So, the correct answer is option A.