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 softskills communication

Asps

  1. a small poisonous plant

  2. a small poisonous frog

  3. a small poisonous insect

  4. a small poisonous snake
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Asps are venomous snakes, particularly the Egyptian cobra (Naja haje), famous in history and literature (Cleopatra's legendary suicide). They are snakes, not plants, frogs, or insects. 'Small poisonous snake' is the correct identification.

Multiple choice softskills communication

The word Iouea (a genus of sea sponges)is the shortest word which contains all five regular vowels and no other letters.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

'Iouea' is a valid scientific genus name for a type of sea sponge, and it contains all five vowels (a, e, i, o, u) exactly once each, in order, with no other letters. While it's obscure, it's a legitimate taxonomic name. It's not a common English word but a scientific name, which fits the claim. Some sources mention 'eunoia' or 'facetious' as words containing all five vowels, but Iouea is indeed shorter and has them in alphabetical order.

Multiple choice softskills creativity

Jennifer went swimming in an ocean and saw a shark in the water with her, but she wasn't afraid!!! Why not?

  1. The shark had no teeth.

  2. It was a man-eating shark.

  3. The shark was scared of Jennifer.

  4. I don't know.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is a classic riddle playing on the phrase 'man-eating shark' - Jennifer wasn't afraid because it was a shark that eats men, not humans (or she's a man). The humor comes from taking the literal meaning of a commonly used phrase. 'Shark had no teeth' misses the wordplay, 'shark was scared' is illogical, and 'I don't know' is a surrender.

Multiple choice

The algae commonly known as sea grape is

  1. Meristotheca papulosa

  2. Colpomenia peregrina

  3. Caulerpa racemosa

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

It is a green alga. It is commonly known as sea grape. It is a common seaweed.

Multiple choice

Giant Squid, a deep-ocean dwelling squid in the family Architeuthidae, lives at depths up to one km, where it was long thought that it was immune from human intervention.

  1. was long thought that it was immune from

  2. was long thought to have become immune from

  3. was long thought as being immune to

  4. was long thought to be immune to

  5. was long thought to have been immune to
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct; compact sentence without any ambiguity; removes error of incorrect word usage by using 'immune to'

Multiple choice

Directions: This question presents a sentence, all or part of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

Giant Squid, a deep-ocean dwelling squid in the family Architeuthidae, lives at depths up to one km, where it was long thought that it was immune from human intervention.

  1. was long thought that it was immune from

  2. was long thought to have become immune from

  3. was long thought as being immune to

  4. was long thought to be immune to

  5. was long thought to have been immune to
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct; compact sentence without any ambiguity; removes error of incorrect word usage by using 'immune to'

Multiple choice

The most evident difference between the human brain and the brain of a bony fish is in _____________.

Bony fishes have a skeleton made up of bones. The most prominent examples are herring, eels, sturgeon, salmon, lantern fish, milk fish, flying fish, etc.

  1. brain stem

  2. hippocampus

  3. cerebellum

  4. pituitary

  5. medulla oblongata
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Physically the brain of fish does not have a hippocampus region which is found in higher order vertebrae animals. The hippocampus is the part of the brain that is involved in memory forming, organising, and storing.

Multiple choice

Which of the following fishes is not included in composite fish farming?

  1. Catla

  2. Rohu

  3. Mrigal

  4. Grass carp

  5. Mussels
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option because mussels are farmed in sea water. Composite fish farming includes grass carp, which feeds on weeds. These species can co-exist in a single pond with the others, and thus, increase the yield of fish from the pond. This is the correct option because mussels are farmed in sea water.

Multiple choice

Which of the following are a part of different types of fish culture systems? (a) Carp culture (b) Sewage fed fish culture (c) Fish culture in bundhs (d) Integrated fish culture

  1. a and b

  2. a and c

  3. b and c

  4. a, b and c

  5. a, b, c and d
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Crap culture is also called composite culture. Sewage fed fish culture is very popular and so is fish culture in bundhs. Integrated fish culture is also a part of the different fish cultures in practice. Thus, this answer is correct.

Multiple choice

Which of the following has a closed type of circulatory system?

  1. Cockroach

  2. Fish

  3. Scorpion

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

Fish have a closed circulatory system where blood flows through vessels throughout the body. Cockroaches, scorpions, and Limulus (horseshoe crabs) are arthropods with open circulatory systems where hemolymph bathes tissues directly in sinuses.