Biology · Science General

Diversity in Living Organisms

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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

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 biology food for health fats fats and their test different nutrients in food

Assertion  :Cold blooded animals have no fat layer


Reason  :  Cold blooded animals use their fat for
                   metabolic process during hibernation.




  1. If both the assertion and the reason are true and the reason

    is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is

    not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The body temperature in cold blooded varies with that of the environment as there is no fat deposition. On the other hand, cold blooded animals use fat during hibernation to carry out their metabolic processes.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

Facultative saprophyte is?

  1. A parasite which can live as a saprophyte

  2. Always a parasite

  3. Always a saprophyte

  4. May acquire parasite mode of life
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A facultative saprophyte is an organism that is primarily a parasite but has the ability to survive as a saprophyte (feeding on dead organic matter) under certain conditions.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

A mutant micro-organism unable to synthesize a compound required for its growth, but able to grow if the compound is provided, is known as

  1. Auxotroph

  2. Prototroph

  3. Autotroph

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
An auxotroph is a mutant microorganism that requires some nutrient that is not normally required by the organism (prototroph) from which the mutant was derived. 
A microorganism that has the ability to synthesize all of its amino acids, nucleic acids, vitamins, and other cellular constituents from inorganic nutrients is known as prototroph.  
Autotrophs are those organisms that are able to make energy-containing organic molecules from inorganic raw material by using basic energy sources such as sunlight. 
Thus, the correct answer is option A.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

Which statement is correct about saprophytes ?

  1. They do not possess chlorophyll

  2. They survive on other organisms

  3. They live on dead organism

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

Saprophytes are the class of organism that have saprophytic mode of nutrition. They feed on dead living organism. They are assumed to have evolved from green plants but have lost their chlorophyll during the course of evolution.

Multiple choice bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

Which one of the following does not follow the central dogma of molecular biology?

  1. Chlamydomonas

  2. HIV

  3. Pea

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

The central dogma of molecular biology says DNA, i.e., deoxyribonucleic acid is replicated first to form a copy of DNA. This process is known as DNA replication and is catalyzed by an enzyme called as DNA polymerase (DNA dependent DNA polymerase). This replicated DNA is then transcribed to form an mRNA (messenger RNA molecule). This process is referred as transcription and this is carried out by an enzyme called as RNA polymerase (DNA dependent RNA polymerase), finally the mRNA is translated into a protein.This process is carried out by ribosomes where amino acids are incorporated. This process is known as translation. Francis Crick proposed this concept of central dogma in molecular biology which states that genetic information flows from DNA->DNA->protein. In some viruses, the flow of information is in reverse direction, i.e., from RNA to DNA. This process is known as reverse central dogma or reverse transcription. It takes place in viruses, acellular organisms where RNA replicates via a DNA intermediate. A complimentary DNA molecule is formed from genomic RNA with the help of an enzyme called reverse transcriptase ( RNA dependent DNA polymerase). Eg : HIV which is a retrovirus.

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

Algae $\rightarrow$ .......... $\rightarrow$ Small fish $\rightarrow$ Big fish $\rightarrow$Bird

  1. Small animals

  2. Big animals

  3. Bacteria

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

In a freshwater aquatic ecosystem like a pond, the organisms in the food chain include algae, small animals, insects and their larvae, small fish, big fish and a fish-eating bird or animal.

So, the correct answer is 'small animals'

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 zoology environmental factors soil-nature climate factors abiotic components organisms and environment

Which statements regarding response of organisms to abiotic factors in false?

  1. All birds and mammals are capable of thermoregulation

  2. Majority of animals and nearly all plants cannot maintain a constant internal environment

  3. Shivering is a kind of exercise which produces heat and raises body temperature

  4. Very small animals are commonly found in polar regions as they have to spend less energy to generate heat

  5. Diapause is a stage of suspended development seen in zooplankton
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Small animals have a large surface area relative to their volume, causing them to lose body heat very rapidly in cold environments. Therefore, they are rarely found in polar regions because the energy cost to maintain body temperature is too high.

Multiple choice zoology environmental factors soil-nature climate factors abiotic components organisms and environment

Select incorrect statement :

  1. Orchid epiphytic on Mango is commensal

  2. Bird laying eggs in the nest of another for incubation shows brood parasitism

  3. Most animals and plants maintain a constant internal temperature

  4. Small animals are rare in polar regions

  5. One species harmed, other unaffected in amensalism
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Most animals and plants cannot maintain a constant internal environment (homeostasis) in the face of changing external conditions; they are conformers, not regulators.

Multiple choice bio-chemistry cell biology cytoplasm the components in a cell component of the cell

The main features of Cnidarians is their specialized cells called ________.

  1. Epithelial

  2. Cnidocytes

  3. Coenocytes

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

Cnidocytes contain stinging structure known as nematocysts. Cnidocytes in tentacular region help in capturing the larger prey as their nematocytes discharge toxins into their prey.

Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

Cervical vertebrate differ from other vertebra in having.

  1. Spinous process

  2. Centrum

  3. Transverse process

  4. Transverse foramen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Spinous process is a bony projection off the posterior (back) of each vertebra. It provides the point of attachment for muscles and ligaments of the spine.

Each vertebra consists of a ventral body, or centrum, surmounted by a Y-shaped neural arch. Together the centrum and neural arch surround an opening, the vertebral foramen, through which the spinal cord passes.

Transverse process is a small bony projection off the right and left side of each vertebrae. They function as the site of attachment for muscles and ligaments of the spine as well as the point of articulation of the ribs (in the thoracic spine). 

The cervical spine is much more mobile than the thoracic or lumbar regions of the spine. Unlike the other parts of the spine, the cervical spine has transverse foramina in each vertebra for the vertebral arteries that supply blood to the brain. Thus, option D is correct.