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 evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Excretory organs of protochordate Amphioxus are

  1. Malpighian tubules

  2. Protonephridia

  3. Kidney

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Amphioxus or Branchiostoma is a peculiar chordate animal, which does not have excretory organs in the form of mesodermal kidneys but are in the form of protonephridia. They are similar to protonephridia of flat worms or polychaete, annelids and they are ectodermal in origin. In Amphioxus there are 90 to 100 pairs of protonephridia present segmentally on dorso-lateral pharyngeal wall one above each gill slit on either side. Simply, they are ciliated, thin walled, closed ectodermal tubules like structures.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Urinary bladder is absent in

  1. Aves

  2. Reptiles

  3. Amphibians

  4. Mammal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In mammals, urine is made in the kidneys and travels down through two tubes called ureters to the muscular sac called as urinary bladder. The bladder stores urine, allowing urination to be infrequent and controlled. The urinary bladder is absent in aves because they do not urinate, their excretory waste is excreted as white paste through the cloaca.
So, the correct answer is 'Aves'.
Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

When a fresh water protozoan is placed in marine water

  1. The contractile vacuole disappears

  2. Contractile vacuole increases in size

  3. A number of contractile vacuoles appear

  4. The contractile vacuole remains unchanged.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The function of a contractile vacuole in protozoan is to expel out excess water. When a freshwater protozoan is placed in marine water the contractile vacuole disappears because the function of contractile vacuole is to expel out excess water but in case of marine water, The water should be retained instead of expelled.
So, the correct answer is 'The contractile vacuole disappears'.
Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Archinephros occurs in

  1. Adult hagfish

  2. Larva of hagfish

  3. Molluscs

  4. Anamniotes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Hagfish belongs to the class Myxini. Archinephros or ancestral vertebrate kidney are retained by larvae of hagfish and of some caecilians. Archinephros extend from anterior to the posterior end of the body, with segmentally arranged glomeruli and nephrostomes. Glomeruli received blood from the dorsal aorta and filtered nitrogenous wastes into the coelom, from where they were collected by the nephrostomes and transported to outside via collecting ducts and archinephric ducts.
So, the correct answer is 'Larva of hagfish'.
Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Dermal scales are present in

  1. Anura

  2. Urodela

  3. Labyrinthodontia

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

Gymnophiona, also called apoda, is one of the three major extant orders of the class amphibia. Its members are known as caecilians. Their skin is smooth but some species have colourful skins. Inside the skin are calcite scales. Because of these scales, the caecilians were once thought to be related to the fossil Stegocephalia.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

When compared to the mammals, birds are less sensitive to temporary deprivation of water, because

  1. Urea excretion in mammals entails a greater loss of water than that in birds

  2. Absorption of Water horn the gut is more efficient in birds that in mammals

  3. The water requirement per unit weight is less in birds than in mammal

  4. None of these.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Birds and reptiles have uric acid as their nitrogenous waste. 

The uricotelic organism excretes uric acid in form of a white paste or powder.
this uric acid is advantaged over the urea which is excreted in mammals in certain ways because it is less toxic and reduces water loss and thus it also reduces the need for water for excretion.

So, the correct option is 'Urea excretion in mammals entails a greater lass of water than that M birds'

Multiple choice zoology why classification? nomenclature in classification introduction to plant kingdom history of classification nomenclature of animals

Which one of the following is an example of the binomial scientific name?

  1. Green algae

  2. Snow leopard

  3. Rana tigrina

  4. China-rose
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The binomial name of frog is Rina tigrina. The study of frogs is called batrachology, belonging to class amphibian of Phylum Chordata. The most common species of frog found in India is Rana Tigrina.

So, the correct option is 'Rana tigrina'.

Multiple choice biology living world of animals causes of greenhouse effect global warming adaptation in animals

Many animals have physical adaptation of blending to the environments. This is known as

  1. Mimicry

  2. Behavioural

  3. Migration

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

  1. Mimicry is considered to be the copy of action or behavior of someone or something. It can be in the form of sound, smell, behavior etc.
  2. Behavioral adaptation is the one that organism adapts for the survival. It includes migration, hibernation etc.
  3. Migration is the process in which animal moves large distances in order to avoid seasonal stress. 
  4. Camouflage is a combination of material, colouration and illumination that helps organism either to hide or disguise itself. 
So, the correct option is 'Camouflage'.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Which of the following is not a moneran?

  1. Spirulina

  2. Nostoc

  3. Oscillatoria

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

Moneran are prokaryotic unicellular organisms. They lack membrane-bound organelles. They lack true nucleus. They have genetic material without nuclear envelope. The examples of Moneran include bacteria, blue green algae like Nostoc, Spirulina, Oscillatoria. Euglena is an eukaryotic organism

So, the correct answer is 'Euglena'

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

In Whittaker's classification, non-nucleated unicellular organisms$/$ prokaryotes are included under

  1. Plantae

  2. Monera

  3. Protista

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

Whittaker's classification includes five kingdom classification system. The five kingdoms include Monera, Protista, Fungi, Plantae, and Animalia. Monera includes Eubacteria and Archeobacteria. They include non-nucleated unicellular organisms. They are prokaryotes. They have a cell wall. They have no membrane-bound organelles and true nucleus.

Thus, the correct answer is 'Monera.'

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

These are the organisms which are called prokaryotes.

  1. Green algae, brown algae and red algae

  2. Yeasts and other fungi

  3. Mycoplasmas, bacteria, cyanobacteria

  4. None of the above groups
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Prokaryotes are all single-celled organisms eg, Mycoplasmas, bacteria, cyanobacteria. So, the correct option is C.(Mycoplasmas, bacteria, cyanobacteria)

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Select correct statement w.r.t. Monera

  1. All unicellular and Gram negative

  2. Very simple in behaviour

  3. Show the most extensive metabolic diversity

  4. Show intercellular transport by cyclosis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The kingdom Monera includes all prokaryotes, which may be gram positive or gram negative bacteria. They have a simple structure but are complex in behaviour. Intercellular transport by cyclosis is seen only in eukaryotes and hence is not found in monera. They have an extensive metabolic diversity and their mode of nutrition may be heterotrophic or autotrophic. 

So, the correct option is 'Show the most extensive metabolic diversity'.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Monera is divided into archaebacteria and eubacteria.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Monera is a kingdom that contains unicellular organisms with a prokaryotic cell organization (having no nuclear membrane), such as bacteria. Until recently, all bacteria were grouped together in one kingdom (five-kingdom system). 
  • The five-kingdom system is divided into animals, plants, fungi, protists, and monera. The Monera kingdom is made up of two phyla, or groups. They are archaebacteria and eubacteria.
So, the correct answer is 'True'.