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

Tympanic bone forms large bulla in _______.

  1. humans

  2. australopethicus

  3. Both 1 and 2

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

The tympanic bulla (a bony enclosure of the middle ear) is notably large in lemurs and other prosimians compared to humans and australopithecines. This is an anatomical feature used in primate classification and comparative anatomy.

Multiple choice

Patagium is an organ in flying mammals which is synonym to _______.

  1. hands of man

  2. wings of insects

  3. feathers of birds

  4. fins of fishes

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The patagium in bats is the wing membrane formed by modified skin stretching between the elongated digits (fingers) of the forelimbs, along the body sides to the hindlimbs. This makes it analogous to the hand structure in humans, not insect wings or feathers.

Multiple choice

Dolphins have ________.

  1. homodont and indefinite teeth

  2. heterodont and indefinite teeth

  3. homodont and definite teeth

  4. heterodont and definite teeth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dolphins have homodont dentition (all teeth are similar in shape, conical for catching fish) and their teeth are continuously replaced throughout life (indefinite/polyphyodont). They don't have the differentiated tooth types (heterodont) seen in most mammals.

Multiple choice

In sheep, break down of enzyme resistant cellulose is done by_______.

  1. aerobic bacteria

  2. protozoa

  3. anaerobic bacteria

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In sheep and other ruminants, protozoa living in the rumen are primarily responsible for breaking down cellulose through fermentation. While anaerobic bacteria also contribute, protozoa are the main agents for digesting enzyme-resistant cellulose. Aerobic bacteria cannot survive in the anaerobic environment of the rumen.

Multiple choice

Which of the following is not a characteristic of phylum Cnidaria?

  1. Cnidaria have tissue level of organisation.

  2. Their bodies have single opening.

  3. Digestion is intracellular only.

  4. Muscle and nerve cells appear for the first time in Cnidaria.

  5. They have appendages in the form of tentacles.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option.