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

Unicellular eukaryotic animals are placed in the kingdom

  1. Animalia

  2. Protista

  3. Metaphyta

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

The kingdom Metaphyta (or the plant kingdom in its true sense) includes all the eukaryotic, multicellular, photosynthetic plants found in this biosphere. Kingdom Animalia includes multicellular eukaryotic heterotrophic organisms. Kingdom Monera includes unicellular prokaryotic organisms.

Multiple choice

Members of Kingdom Animalia are

  1. Unicellular

  2. Multicellular

  3. Mostly unicellular, a few multicellular

  4. Mostly multicellular, a few unicellular
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

fact

Multiple choice

Diatoms have

  1. cell wall of cellulose

  2. cell wall of silica

  3. no cell wall

  4. flagellated cell wall
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Diatoms are a group of algae characterised by the presence of a silicated cell wall called frustule.

Multiple choice

Match organisms in Group I with flagellar arrangements in Group II and shapes in Group III.

Group I
Group II
Group III
P. Staphylococcus aureus 1. peritrichous i. spherical
Q. Pseudomonas aeruginosa 2. monotrichous ii. rod-shaped
R. Escherichia coli 3. non-flagellated

  1. P - 1 - i, Q - 2 - i, R - 3 - ii

  2. P - 1 - ii, Q - 3 - i, R - 2 - ii

  3. P - 2 - ii, Q - 1 - i, R - 3 - ii

  4. P - 2 - ii, Q - 3 - i, R - 1 - i

  5. P - 3 - i, Q - 2 - ii, R - 1 - ii
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Staphylococcus aureus is a non-flagellated, spherical, Gram-positive bacterium. Pseudomonas aeruginosa is a monoflagellated (monotrichous), rod-shaped, Gram-negative bacterium. Escherichia coli is a peritrichous, rod shaped, Gram-negative bacterium.

Multiple choice

Which of the following genera of mollicutes do not exhibit respiratory metabolism?

  1. Mycoplasma
  2. Ureaplasma
  3. Acholeplasma
  4. Anaeroplasma
  5. Spiroplasma

Select the correct answer using codes given below:

  1. 1, 2 and 3

  2. 1, 2 and 4

  3. 1, 3, 4 and 5

  4. 2, 3, 4 and 5

  5. All
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mycoplasma exhibits fermentation metabolism. Acholeplasma exhibits fermentation metabolism. Anaeroplasma exhibits fermentation metabolism. Spiroplasma exhibits fermentation metabolism.

Multiple choice

Which of the following organisms has the capacity of regeneration?

  1. Planaria

  2. Amoeba

  3. Plasmodium

  4. Spirogyra
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If an individual is somehow cut or broken up into many pieces, many of these pieces grow into separate individuals. For example, simple animals like Hydra and Planaria can be cut into any number of pieces and each piece grows into a complete organism. 

Multiple choice

Which of the following statements is false about corals?

  1. Some corals can catch small fish and plankton.

  2. Corals typically live in compact colonies of many non-identical individual polyps.

  3. A coral head is a colony of myriad genetically identical polyps.

  4. Individual heads grow by asexual reproduction of polyps.

  5. An exoskeleton is excreted near the base.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Corals are marine invertebrates in the class Anthozoa of phylum Cnidaria. They typically live in compact colonies of many identical individual polyps.

Multiple choice

Which of the following sponges is/are the solitary, living sponges characterised by ptychocysts?

  1. Demosponge

  2. Hexactinellids

  3. Octocorallia

  4. Hexacorallia

  5. Cerianthids
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Cerianthids look very similar to sea anemones. They are solitary, living buried in soft sediments. Tube anemones live and can withdraw into tubesthat are made of a fibrous material, which in turn is made from secreted mucus and threads of nematocyst-like organelles known as ptychocysts.

Multiple choice

Which of the following members of porifera use spines for locomotion?

  1. Onychophorans

  2. Nematomorphs

  3. Priapulids

  4. Kinorhynchans

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

Kinorhynchans are segmented, limbless animals with a body consisting of a head, neck and a trunk of eleven segments. Unlike some similar invertebrates they do not have external cilia, but instead have a number of spines along the body, plus up to seven circles of spines around the head. These spines are used for locomotion.

Multiple choice

A hermaphrodite is an organism that has reproductive organs of both male and female sexes. Which of the following sponges is a hermaphrodite sponge?

  1. S. officinalis

  2. Agelas clathrodes

  3. Chalinula nematifera

  4. Azure vase sponge

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

S. officinalis is a hermaphrodite having both ova and sperm. When ripe, their sperm escape from the body through vents and float around in the sea until they are sucked into the pores of another sponge by a water current. This sponge is dark grey or purplish when alive. When dry they can either be yellow or brown.