Biology · Science General

Diversity in Living Organisms

3,323 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

Physiological evidence through blood test reveals that turtles are more closely related to

  1. mammals than to crocodiles, lizards and mammals

  2. snakes than to crocodiles, lizards and mammals

  3. crocodiles than to lizards, snakes and mammals

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

Physiological evidence through blood test reveals that turtles are more closely related to crocodiles than to lizards, snakes and mammals. The term turtle is usually used for aquatic or semiaquatic forms and resembles crocodiles in possession of  palate, immovable quadrate, protease, etc.

Multiple choice

Which of the following combinations of phylum and description is incorrect?

  1. Echinodermata – bilaterial and radial symmetry, coelom from archenteron

  2. Nematode – roundworms, pseudocoelomate

  3. Cnidaria – radial symmetry, polyp and medusa body forms

  4. Porifera – gastrovascular cavity, coelomate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Option D is incorrect because Porifera (sponges) do NOT have a gastrovascular cavity - they have a unique water canal system with ostia, spongocoel, and osculum for filter feeding. Also, sponges are NOT coelomate - they have no true body cavity. The other options are correct: Echinoderms have bilateral larval and radial adult symmetry, Nematodes are roundworms with pseudocoelom, Cnidarians have radial symmetry with polyp/medusa forms.

Multiple choice

Where do terrestial animals live?

  1. They live in water.

  2. They live on land.

  3. They live in air.

  4. They live on trees.

  5. They live both on land and in water.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The animals that live on land are called terrestrial animals.

Multiple choice

Which of the following statements is incorrect about birds?

  1. Birds are ariel animals.

  2. Their front limbs are modified as wings.

  3. They move their wings up and down and push themselves through the air.

  4. They use their legs and claws to sit on a tree and hop on the ground.

  5. The bones of birds are solid and heavy which help them to fly high with ease.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The bones of birds are hollow and are light. This characteristic of their body helps them to fly high in the air.          

Multiple choice

Which of the following pairs of organs of animals is/are not homologous?

  1. Forelimbs of humans and lizards

  2. Forelimbs of frogs and lizards

  3. Forelimbs of humans and frogs

  4. Forelimbs of bats and butterfly

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. The forelimbs of bats and butterfly are not homologous organs as they have different basic design, though they are used for the same purpose.

Multiple choice

Which of the following statements is/are incorrect? (I) Mimicry is the ability of an organism to blend with background. (II) Camouflage allows animals to remain unnoticed from a distance. (III) The longest distance travelled by an animal is that of sea bird Arctic tern. (IV) A locust shows periodic migration.

  1. I, III

  2. III, IV

  3. I only

  4. II, III
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement I is incorrect - mimicry is resembling another organism or object for protection, not blending with background (that's camouflage). Statement II (camouflage allows animals to remain unnoticed from distance) is correct. Statement III (Arctic tern's longest migration) is correct. Statement IV (locusts' periodic migration) is correct.

Multiple choice

Which of the following statements is true about E.coli?

  1. It is a parasite present in the liver of humans.

  2. It shows syngamy and meiosis.

  3. It exhibits alternation of generation.

  4. It exists symbiotically in the colon of humans.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

E. coli is a commensal bacterium that normally exists symbiotically in the human colon (large intestine). It's not a liver parasite, doesn't undergo syngamy/meiosis (it reproduces asexually by binary fission), and doesn't show alternation of generations (a plant/algae lifecycle pattern).