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 one of the following features is not related to penguins?

  1. Good swimmer

  2. White fur

  3. Thick and fatty skin

  4. Inhabitant of tropical rainforest
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Penguin is a well know animal living in the polar regions. It is white, has a thick skin and a lot of fat to protect it from cold. Penguins are inhabitants of polar regions and not the tropical regions

Multiple choice

Arrange the following organisms in increasing order of genome size.

  1. Borrelia burgdorferi 2. Helicobacter pylori 3. Mycoplasma pneumoniae 4. Treponema pallidum

  1. 1 < 2 < 3 < 4

  2. 1 < 3 < 2 < 4

  3. 2 < 4 < 1 < 3

  4. 3 < 4 < 1 < 2

  5. 3 < 1 < 4 < 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Organism (Genome size in millions of nucleotide pairs): Mycoplasma pneumoniae (0.8) Treponema pallidum (1.1) Borrelia burgdorferi (1.3)  Helicobacter pylori (1.7) Hence, the correct order is 3 < 4< 1 < 2.

 

Multiple choice

Which of the following sponges closely resemble the sea anemones?

  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 tubes, which are made of a fibrous material, which is made from secreted mucus and threads of nematocyst-like organelles, known as ptychocysts.

Multiple choice

Members of ___________ order are commonly known as velvet worms.

  1. the Kinorhynchans

  2. the Loricifera

  3. the Priapulids

  4. the Nematomorphs

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

Onychophora is commonly known as velvet worms.They are segmented creatures with a flattened cylindrical body. Their skin consists of numerous, fine transverse rings and is often inconspicuously coloured orange, red or brown.

Multiple choice

Which of the following is a hermaphrodite sponge?

  1. S. officinalis

  2. Haliclona compress

  3. Agelas clathrodes

  4. Chalinula nematifera

  5. Azure vase sponge
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

S. officinalis is a hermaphrodite; each one has both ova and sperm. When ripe, their sperm escape the body through vents and float around 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.

Multiple choice

Which of the following statements regarding the sponges is INCORRECT?

  1. All sponges are sessile aquatic animals.

  2. Most species follows sexual reproduction.

  3. Sponges are multicellular autotrophic and produce sperm cells.

  4. The sponge's closest single-celled relatives are thought to be choanoflagellates.

  5. The mesohyl functions, as an endoskeleton in most sponges.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells. Unlike other animals, they lack true tissues and organs and have no body symmetry.

Multiple choice

Which of the following lobate sponges has tendency to form upright, short, anastomosing tubes?

  1. Row Pore Rope Sponge

  2. Scattered pore rope sponge

  3. Chimney sponge

  4. Chicken-liver sponge

  5. Branching vase sponge
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

These sponges are lobate, repent masses with a tendency to form upright, short, anastomosing tubes. Individual lobes 2-3 cm in diameter, tubes up to 4 cm high. Oscules and vents apical, up to 12 mm in diameter, flush or with thin collars.  

Multiple choice

Which of the following sponges is characterised by rubbery, cheese-like consistency?

  1. Agelas clathrodes

  2. Agelas conifera

  3. Agelas nsp.

  4. Amphimedon viridis

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

These sponges are  chiefly massive, frequently lobate to rarely ramose. Ramose outcrops up to 15 cm long, lobes up to 6 cm high. Total size up to 17 cm in diameter in massive specimens. Their surface is irregularly conulose, with large smooth areas showing fields of pores. The consistency is rubbery, cheese-like and somewhat compressible.

Multiple choice

Which of the following statements does NOT characterises bath sponges?

  1. They are more-or-less cup-shaped animals.

  2. Some species of glass sponges forms bioherms.

  3. Glass sponges are relatively uncommon.

  4. The body is relatively asymmetrical.

  5. Much of the body is composed of syncitial tissue.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The body is relatively symmetrical, with a large central cavity that in many species, opens to the outside through a sieve formed from the skeleton.

Multiple choice

Directions: The following passage consists of six sentences. The first sentence (S1) and the final sentence (S6) are given in the beginning. The middle four sentences have been removed and jumbled up. These are labelled as P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark your answer accordingly. S1 : The ancestors of whales, it is said, lived on land, for they still have slight traces of hind-legs. S6 : It has flippers on its sides to keep it balanced and layers of fat or oil under the skin which furnish heat and make the huge body light and buoyant. P : But ages ago, whales changed their home-moving from the land to the sea. Q : It is shaped like a submarine boat, with a tail turned into a power paddle. R : The whale is suited to live in water. S : They are warm-blooded animals and feed their babies as land mammals do.

  1. PRSQ

  2. SPRQ

  3. RQPS

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

"They" in S refers to 'ancestors' in S1. So, option 2 can be the only possible answer.

Multiple choice

Directions: The given question consists of certain statements. Select the option representing the most logical sequencing of the given statements.

A. Alligator is an amphibian. B. Monkey is a mammal. C. Mammals live on land.
D. Some mammals live on land. E. Amphibians can live in water and on land.
F. Alligators can live in water and on land.

  1. BCD

  2. CEF

  3. BEF

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

Option (4) AEF A → Alligator is an amphibian. E → Amphibian can live in water and on land. These two sentences automatically imply that alligators can live both in water as well as on land. Therefore, the given sentence F is valid for sequence. This marks option (4) correct.

Multiple choice

Which of the following is a set of microbes used as single cell proteins (SCPs)?

  1. Chlorella, Spirulina, Yeasts

  2. Propionibacterium, Jatropha, Hevea brasiliensis

  3. Agrobacterium tumifacium, Spirulina, Hevea brasiliensis

  4. Propionibacterium, Agrobacterium tumifacium, Yeasts

  5. Chlorella, Spirulina, Agrobacterium tumifacium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chlorella, Spirulina and Yeasts are used as single cell proteins.