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

Which structure is used by amoeba and leukocytes for their movement?

  1. Fimbriae

  2. Pseudopodia

  3. Pilus

  4. Glycocalyx

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

In amoeba and leukocytes, the cellular movement occurs by pseudopodia. The plasma membrane extends in the direction of the movement  followed by the cytoplasm. The pseudopodia in other directions are withdrawn and the process is repeated.

Multiple choice

Which of the following is/are not a property of viviparous animals?

a. The young one of the animal develops inside the egg. b. When the young one is fully developed, the mother gives birth due to which the alive young one comes out from the body of the mother. c. The viviparous animals do not lay eggs outside their body.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

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

This is the correct option as this is not a property of viviparous animals. 

Multiple choice

Which of the following statements does not characterise fungi?

  1. The fungi have haploid nuclei.

  2. Some fungi display the phenomenon of bioluminescence.

  3. Fungi have a cell wall.

  4. A fungal cell contain membrane-bound nuclei.

  5. Fungi are autotrophic organisms.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is a correct statement, as fungal cells contain membrane-bound nuclei with chromosomes that contain DNA with noncoding regions called introns and coding regions called exons. This is ane incorrect statement, as fungi lack chloroplasts and are heterotrophic organisms, so they require preformed organic compounds as energy sources.

Multiple choice

Which of the following statements does NOT characterise lichens?

  1. A lichen is a composite organism.

  2. The fungal partner protects the alga.

  3. The fungus is called a mycobiont.

  4. A lichen is made up of a simple photosynthesising organism.

  5. Lichens come in many colours.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The algal partner protects the fungal partner by retaining water, serving as a larger capture area for mineral nutrients and in some cases, provides minerals obtained from the substrate.

Multiple choice

The termites could not damage wooden structures without the cooperation of which of the following organisms?

  1. Giardia

  2. Entamoeba

  3. Trichomonas

  4. Trichonympha

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

Trichonympha is a genus of parabasalian protists that live in the intestines of termites. They are symbiotes as they break down the cellulose in the wood and plant fibres their hosts eat. They are extremely motile and feed by engulfing wood and plant fibres through phagocytosis, which always occurs at the broad ends of their bodies.

Multiple choice

Which of the following monerans is devoid of a cell wall?

  1. Actinomycetes

  2. Cyanobacteria

  3. Mycoplasma

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

Mycoplasma are unique among monerans (bacteria) because they completely lack a cell wall. They are the smallest self-replicating organisms and have only a plasma membrane. This makes them resistant to antibiotics like penicillin that target cell wall synthesis. Actinomycetes, cyanobacteria, and regular bacteria all have cell walls.

Multiple choice

Which of the following is a prokaryotic microbe?

  1. Yeast

  2. Sporozoan

  3. Spirochete

  4. Diatom

  5. Choanoflagellate

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

Spirochetes are long and slender bacteria, and placed in domain bacteria (prokaryote). These are thin, corkscrew-shaped, gram-negative and flexible organisms that range in length from a few to as many as 500 µm.