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 biology the world of microbes protista protozoa five kingdoms of living organisms

Which of the following kingdoms has no well defined boundaries? 

  1. Monera

  2. Protista

  3. Fungi

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Five kingdom classification was proposed by R.H. Whittaker. According to this organisms has been divided into five kingdoms Monera, Protista, Fungi, Animalia, Plantae. Organisms are divided on the basis of different characters like cell boundary, shape, type of nutrition etc.
According to R.H. Whittaker classification-
Monera has a cell wall. It is made up of polysaccharides i.e. peptidoglycan
Fungi have a cell wall. It is made up of chitin.
Protista has no well-defined boundaries.
So, the correct answer is 'Protista'.
Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Members of Kingdom Protista are primarily 

  1. parasites

  2. terrestrial

  3. aquatic

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

All single-celled eukaryotes are placed under Protista, but the boundaries of this kingdom are not well defined. Members of Protista are primarily aquatic. This kingdom forms a link with the others dealing with plants, animals, and fungi. Being eukaryotes, the protistan cell body contains a well-defined nucleus and other membrane-bound organelles.

So the correct option is "aquatic".

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

In which kingdom will you place an organism which is unicellular, eukaryotic and photosynthetic?

  1. Kingdom Plantae

  2. Kingdom Monera

  3. Kingdom Protista

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

Protists are eukaryotic organisms that are mostly unicellular in nature. They can be mainly classified into three main categories:-

  • Animal-like protists, which are heterotrophs and has the ability to move.

  • Plant-like protists- that are autotrophs and can photosynthesize.

  • Fungi like protist- that are heterotroph and possess a cell with the cell wall.

  • Kingdom Plantae includes mainly multicellular, eukaryotic organisms that have the ability to do photosynthesis. Kingdom Monera composed of organisms that are prokaryotic and unicellular. 

  • Kingdom Animalia includes animals which are eukaryotic multicellular. They do not perform photosynthesis.

So, the correct option is C.

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

This taxonomic group of living organisms is primarily comprised of unicellular eukaryotes but does some members which are colonial, and some which display true multicellularity. The cells of organisms in this group have a nucleus and membrane-bound organelles, and include both autotrophic and heterotrophic organisms.
Which taxonomic group of organisms is described above?

  1. Kingdom Plantae

  2. Kingdom Fungi

  3. Kingdom Animalia

  4. Kingdom Protista

  5. Domain Bacteria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Plantae is the kingdom of multicellular and photoautotrophic organisms which grow indefinitely. The body is differentiated into root, stem and leaves. Mode of nutrition is autotrophic due to presence of chlorophyll. Cell wall is present which is made up of cellulose.
B. Fungi is a kingdom of heterotrophic organisms. Fungi have filamentous forms called hyphae.
C. Kingdom Animalia comprises multicellular organisms having eukaryotic cells. Cell wall is absent and the mode of nutrition is heterotrophic.
D. Kingdom Protista consists of eukaryotic organisms which are solitary unicellular or colonial unicellular. Cell wall may or may not be present. A well defined nucleus is present. The cytoplasm contains a variety of membrane bound organelles like mitochondrion, plastids, endoplasmic reticulum, Golgi bodies. Mode of nutrition may be autotrophic or heterotrophic depending upon the organisms.
E. Domain bacteria consists of prokaryotic organisms which lack a well defined nucleus and membrane bound organelles. Mode of nutrition is autotrophic ( photosynthetic and chemosynthetic) and heterotrophic.
So, the correct answer is Kingdom protista.
Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Choose the correct answers from the alternatives given.
Which of the following protists do not have multicellular representatives?

  1. Chrysophyta

  2. Phaeophyta

  3. Rhodophyta

  4. All of these include multicellular representatives
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chrysophyta, Phaeophyta, Rhodophyta are the group which contains multicellular organisms.

So, the correct option is 'All of these include multicellular representatives'.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

Two species of Amoeba X & Y were kept in fresh water & got adapted. Species developed contractile vacuole. When both were transferred to sea water and got adapted, both X and Y lost their contractile vacuole. From these observation were concluded that.

  1. Both X & Y are marine species

  2. Species Y is marine & X is fresh water

  3. Species X is marine & Y is fresh water

  4. Both X & Y are fresh water species
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The contractile vacuole eliminates excess water which enters the cell by osmosis. Because of the hypotonic nature fresh water continuously transfers into amoeba by osmosis. To avoid this, they develop contractile vacuoles. Marine amoeba is isotonic in water and they do not have contractile vacuoles. Both X and Y species are marine species. That’s why they developed contractile vacuoles when they kept in freshwater. But they lost their contractile vacuoles when transferred to seawater. There is already hypertonic environment in seawater to control water loss by themselves. 

Hence, the correct answer is option A.
Multiple choice vernalisation plant growth growth and development plant growth and development biology

Which is incorrect statement?

  1. There are no mesodermal cells in pseudocoelomates

  2. There is no body cavity in first triploblastic animals

  3. There is no second opening in diploblastic animal gut

  4. There is no co-ordination between cells of sponges
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Animals have a pseudocoelom that means  “false cavity”, which is a fluid-filled body cavity. Tissue derived from mesoderm partly lines the fluid-filled body cavity of these animals. It is mainly found in Nematoda.

So the correct option is 'There are no mesodermal cells in pseudocoelomates'

Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

Which of the following class of annelids lacks the ability of regeneration?

  1. Oligochaeta

  2. Polychaeta

  3. Hirudinea

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Phylum Annelida is divided into three classes. They are Polychaeta, Oligochaeta, and Hirudinea.
  • The members of the class Polychaeta and Oligochaeta are segmented and process the ability of regeneration while members of class Hirudinea lacks segmentation and ability of regeneration
  • For example, Leeches belong to Hirudinea class of annelids and it lacks the ability of regeneration.
  • So, the correct answer is 'Hirudinea'.
Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

Which of the following phylum lacks the ability of regeneration?

  1. Protozoa

  2. Porifera

  3. Coelenterata

  4. Nemathelminthes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Nemathelminthes  is a phylum of unsegmented, triploblastic, pseudocoelomic, cylindrical or thread-like worms which are covered by a body wall having cuticle and epidermis. They are commonly called threadworm or roundworm.
  • The members of the phylum Nemathelminthes lacks the ability of regeneration because they do not have stem cells required for regeneration.
  • So, the correct answer is 'Nemathelminthes'.
Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

The development of antenna-like structure in place of the eye in lobster is an example of 

  1. Compensatory hypertrophy

  2. Heteromorphic regeneration

  3. Morphollaxis

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Heteromorphic regeneration is the phenomenon in which a different organ develops from the one that has been removed. For example, In lobsters, the eye is regenerated, If it is removed from the eyestalk. But if the eye is removed along with optic ganglion, instead of eye an antenna like the organ is regenerated.
  • This type of regeneration occurs in lower animals.
Hence The development of antenna-like structure in place of the eye in lobster is an example of  Heteromorphic regeneration.
  • So, the correct answer is 'Heteromorphic regeneration'.
Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

The eye of lobster is replaced by an antenna like structure. It is an example of

  1. Reparative regeneration

  2. Heteromorphic regeneration

  3. Physiological regeneration

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Heteromorphic regeneration is the phenomenon in which a different organ develops from the one that has been removed. For example, In lobsters, the eye is regenerated, If it is removed from the eyestalk. But if the eye is removed along with optic ganglion, instead of eye an antenna like the organ is regenerated.
  • This type of regeneration occurs in lower animals.
  • Hence The eye of lobster is replaced by an antenna-like structure. It is an example of Heteromorphic regeneration.
  • So, the correct answer is 'Heteromorphic regeneration'.
Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

Repetitive regeneration is found in

  1. Tadpole

  2. Molluscs

  3. Hydra

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

The process of renewal, restoration, and growth that makes genomes, cells, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage is called Repetitive regeneration. In Hydra, it occurs as foot regeneration arising from the basal part of the body, and head regeneration, arising from the apical region. Head regeneration requires complex reconstruction of the area, while foot regeneration is much simpler, similar to tissue repair.

So, the correct option is ‘Hydra’.

Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

Regeneration is possible in tadpoles for amputated

  1. Tail and hind limbs

  2. Jaws and eyes

  3. Intestine

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

Formation of new parts of the body, which are lost due to injury or accidents is called Restorative regeneration. In tadpoles, regeneration of tails and hind limbs occur. It is restorative regeneration.

So, the correct option is ‘Tail and hind limbs’.

Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

Salamander and Axolotl larva regenerate

  1. Limbs, eye structures and intestine

  2. Jaws and external gills

  3. Both A and B

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

Formation of new parts of the body, which are lost due to injury or accidents is called Restorative regeneration. In Salamander and Axolotl larvae regenerate Limbs, eye structures and intestine, jaws and external gills. It is called restorative regeneration.

So, the correct option is ‘Both A and B’.

Multiple choice biology reproduction in living organisms regeneration asexual modes of reproduction reproduction in animals

What is true about regeneration?

  1. Beak in birds

  2. Tails in lizards

  3. Fish fins

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Formation of new cells or tissues from injured parts of the body is called Regeneration. It occurs in plants as well as animals. Regeneration of Beak in birds, tails in lizards, fish fins are best examples of regeneration.

So, the correct option is ‘all the above’.