Biology · Science General

Diversity in Living Organisms

3,829 Questions

The diversity in living organisms deals with the classification of life forms into various kingdoms and phyla. This topic covers specific traits of bacteria, animal body cavities, and structural adaptations for survival. These fundamentals are crucial for biology sections in medical entrance and state board exams.

Animal phyla characteristicsBacteria and flagellaBiological adaptationsKingdom Animalia classificationBody cavity typesExtinct organism subphylaJawless animals identification

Diversity in Living Organisms Questions

Multiple choice

The creatures give one the feeling that they

Directions: Read the passage and answer the following question:

South America is the home to some of the strangest, some of the loveliest and some of the most horrifying animals in the world. There can be few creatures more improbable than the sloth which spends its life in a permanent state of mute slow motion, hanging upside down in the tall forest trees: few more bizarre than the giant ant eater of the Savannahs with its absurdly disproportionate anatomy, its tail enlarged into a shaggy banner and its jaws elongated into a curved and toothless tube. On the other hand, beautiful birds are so common as to become almost unremarkable. Gaudy macaws flap through the forest, their splendid plumage contrasting incongruously with their harsh cries; and humming-birds, like tiny jewels, flit from flower to flower sipping nectar, their iridescent feathers flashing the colours of the rainbow as they fly.
Many of the South American animals inspire the fascination which comes from revulsion. Shoals of cannibal fish infest the rivers waiting to rip the flesh from any animal which tumbles among them, and vampire bats, a legend in Europe but a grim reality in South America, fly out at night from their roosts in the forests to suck blood from cows and men.

  1. are ridiculous

  2. are funny

  3. can hardly ever exist

  4. are impossible to find
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The word 'improbable', given in the second sentence of the passage, means not likely to happen or be true. This points towards the option (3) to be the correct answer.

Multiple choice

An animal with achitinous exoskeleton, haemocoel and gills belongs to

  1. aschelminthes

  2. arthropoda

  3. echinodermata

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

Arthropods are characterized by a chitinous exoskeleton, a haemocoel (body cavity filled with hemolymph), and gills (or gill-derived respiratory structures like book lungs or tracheal systems). This combination of features is unique to arthropods among the options given.

Multiple choice

Chitin as an exoskeleton is found in

  1. periplaneta

  2. ascaris

  3. pheretima

  4. hydra

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

Chitin forms the exoskeleton in arthropods including Periplaneta (cockroaches). Ascaris and Pheretima are annelids (worms) that lack chitinous exoskeletons. Hydra is a cnidarian and amoeba is a protozoan - neither has a chitin exoskeleton. Chitin provides structural support and protection in arthropods.

Multiple choice

Match the following animals according to their symmetry:

Coelenterates, Annelids, Chordates, Echinoderms, Arthopods

  1. Radial - Chordates and Echinoderms Bilateral - Coelenterates, Annelids and Arthropods

  2. Radial - Coelenterates and Echinoderms Bilateral - Chordates, Annelids and Arthropods

  3. Radial - Annelids, Arthropods and Echinoderms Bilateral - Coelenterates and Chordates

  4. Radial - Annelids, Arthropods and Chordates Bilateral - Coelenterates and Echinoderms

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

Radial symmetry is symmetrical arrangement of parts of an organism.

Multiple choice

Which of the following facts about Arthropods are correct?

  1. They have an exoskeleton made up of cuticle, lipids, proteins.
  2. They have a closed circulatory system.
  3. They undergo a transformation known as metamorphosis during their lifecycle.
  4. They account for 2/3rd of all currently known living and fossil organisms.
  5. Trilobitomorpha is an extinct group of arthropods.

  1. 1, 2 and 5

  2. 1, 3 and 5

  3. 1, 4 and 5

  4. 2, 3 and 4

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

1st statement is correct as the body of arthropods is enclosed in a hard structure.

Multiple choice

Which of the following are the examples of analogous organs?

  1. Wings of bird and bat

  2. Forelimbs of man and bat

  3. Forelimbs of man and bird

  4. Forelimbs of frog and lizard
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Analogous organs are the organs which have the same function but are of different origin. Wings of birds and bats are analogous organs.

Multiple choice

Endosymbiosis is useful for

  1. only host

  2. only endosymbiont

  3. both host and endosymbiont

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Symbiosis is useful for both host and endosymbiont.