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

Which of the following is true about sponges?

  1. They have a well developed nervous system.

  2. They are all sessile.

  3. They have a complex digestive system.

  4. They have a complex circulatory system.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Sponges are sessile aquatic animals.

Multiple choice

Portuguese man-of-war is

  1. a colonial organism of phylum Echinodermata

  2. a true jellyfish from phylum Cnidaria

  3. a colonial organism of phylum Cnidaria

  4. it is a man eating octopus of phylum Mollusca
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Portuguese man-of-war belongs to phylum Cnidaria and is a colony of minute individuals called zooids.

Multiple choice

Mesoglea in Hydra is

  1. a non living substance that is filled between two epidermal layers

  2. a living substance between two layers of Hydra

  3. a specialised cell aiding in locomotion

  4. a bactericide recently discovered in Hydra
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mesoglea is a gel like substance seperating the two body layers of Hydra.

Multiple choice

Which of the following is true about birds?

  1. They have three-chambered heart.

  2. They are the least diverse tetrapod vertebrates.

  3. They excrete urea and ammonia as excretory products.

  4. They have a strong beak but no teeth.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Birds lack teeth and the beak performs grinding of food into smaller particles.

Multiple choice

Which of the following is not a multicellular organism?

  1. Paramecium

  2. Fish

  3. Cockroach

  4. Pea plant

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

Reason: Multicellular - made up of many cells Fish, Cockroach and pea plant - are examples of animals, insects and plants which are multicellular.Paramecium - is an example of protozoans which are a type of Protist (unicellular eukaryotic organism). Therefore, Paramecium is a unicellular organism as it is made up only one cell.   

Multiple choice

Organisms which have a well defined nucleus with a nuclear membrane are known as

  1. prokaryotes

  2. unicellular

  3. eukaryotes

  4. multicellular

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

Nucleus has a double layered covering called nuclear membrane. It is composed of DNA and protein. DNA molecules (Deoxyribonucleic acid) contain the information necessary for constructing and organising cells. Eukaryotes is the correct answer. Organisms with cells having a nuclear membrane are called eukaryotes, e.g. plants, animals.

Multiple choice

Which of the following statements is not true?

  1. The size of prokaryotic cell is smaller than eukaryotic cell.

  2. Prokaryotic cell has a single chromosome.

  3. Cell membrane of a eukaryotic cell bears respiratory enzymes.

  4. Nucleus is bound by nuclear membrane in eukaryotic cell.

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

Cell membrane of a eukaryotic cell bears respiratory enzymes. Respiratory enzymes is an enzyme, such as oxidases, that transfer electrons from its substrate to molecular oxygen. During cellular respiration, cell membrane bears respiratory enzyme in prokaryotic cells but in eukaryotes cell, membrane lacks respiratory enzyme. In case of eukaryotic cell, respiratory enzymes are present in mitochondrial membrane. 

Multiple choice

Which of the following organisms can change its shape?

  1. Amoeba

  2. Plant

  3. Bacteria

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

Amoeba has no definite shape or size because it uses amoeboid movement, as a form of locomotion. They can create extensions of their body wall called pseudopodia (false feet) that helps them to locomote or capture prey. 

Multiple choice

Which of the following is a unicellular organism?

  1. Bacterium

  2. Fungus

  3. Plant

  4. Animal

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

Reason: Bacterium belong to the kingdom Monera which are composed of unicellular organisms. Fungus: They are multicellular organisms belonging to kingdom animalia. Plants & Animals: They are multicellular eukaryotes.