Tag: classification of organisms

Questions Related to classification of organisms

A common characteristic of all vertebrates is

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Presence of skull

  2. Division of body into head, neck, trunk and tail

  3. Presence of two pairs of functional appendages

  4. Body is covered with an exoskeleton

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Correct Option: A
Explanation:
A. Vertebrates are advanced chordates having cranium (brain box) around the brain and hence, they are called as craniata. So, all vertebrates have skull i.e. cranium.
B. Their body consists of serially arranged vertebrae which comprises of a major part of their axial exoskeleton, the vertebral column or the backbone.
C. Their skin covered by protective skeleton that comprises of scales, feathers, hair, etc.
D. They have an endoskeleton which may be made up of cartilage or bones.
Hence, statement A is correct. So, the correct answer is 'Presence of skull'. 

Which one is not characteristic feature of subphylum vertebrata?

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Dorsal tubular nerve chord

  2. Ventral muscular heart

  3. Notochord in adult

  4. Kidneys

  5. Lateral appendages

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Correct Option: C
Explanation:
Vertebrates are also known as Euchordates. They are advanced chordates. Characteristics of phylum vertebrates are:
  • Notochord is present only in embryonic stages and in adults, it is replaced by vertebral column or backbone.
  • The heart is ventrally placed and is usually with hepatic portal system.
  • The excretory organs are paired kidneys.
  • Skin is covered by a protective skeleton which consists of lateral appendages, hair, feathers etc.
Hence, notochord in adult is not a characteristic feature of subphylum vertebrata. So, the correct answer is 'Notochord in adult'.

Which of the following is a catfish?

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Labeo rohita

  2. Catla catla

  3. Cirrhina mrigala

  4. Wallago attu

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Correct Option: D
Explanation:
A. Labeo rohita, known as the carp fish, is found in sluggish and clear streams.
B. Catla catla, known as the major carp, is a freshwater fish.
C. Cirrhina mrigala is a ray finned fish in the genus Cirrhina.
D. Wallago attu is a freshwater catfish in the family Siluridae.
So, the correct answer is 'Wallago attu'.

Which of the following statements is true?

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. All chordates are vertebrates

  2. All vertebrates are chordates

  3. Invertebrates possess a tubular nerve cord

  4. Non-chordates have a vertebral column

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Correct Option: B
Explanation:

  • In vertebrates, notochord is present only in embryonic stages and then it is replaced by a vertebral column or backbone.
  • In chordates, notochord is present throughout the life of the organism.
Hence, all vertebrates are chordates but all chordates are not vertebrates.
So, the correct answer is 'All vertebrates are chordates'.

Pectoral fins are enlarged in

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Hippocampus

  2. Exocoetus

  3. Coccosteus

  4. Scoliodon

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Correct Option: B
Explanation:
A. Hippocampus, commonly known as sea horse, is a small marine fish.
B. Exocoetus is known as flying fish. It has a powerful tail by which it is able to make large jumps over the surface of water. It has enlarged pectoral fins.
C. Coccosteus is a genus of extinct placoderm fishes.
D. Scoliodon is known as Dog fish. It has powerful sense of smell like that of a dog.
So, the correct answer is 'Exocoetus'.

Glomerular kidney occurs in fish

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Tilapia

  2. Cirrhinus

  3. Sphyrna

  4. Exocoetus

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Correct Option: D
Explanation:
A. Tilapia is a freshwater cichlid fish. It is an edible fish and used as a source of food.
B. Cirrhinus is a genus of ray-finned fishes in the Carp family.
C. Sphyrna is a hammerhead shark. Its head is flattened and laterally enlarged into a hammer.
D. Exocoetus is known as flying fish. It has a powerful tail which helps it to take large jumps over the surface of the water. 
A glomerular kidney is present in Exocoetus. So, the correct answer is 'Exocoetus'.

What is the basis of classification of vertebrata into sub groups?

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Notochord

  2. Vertebral column

  3. Organs of respiration

  4. Organs of reproduction

Show answer
Correct Option: C
Explanation:

Vertebrata is a class of organisms containing notochord and vertebral column.

These organisms are divided into subgroups by modes of respiration. For example, fishes breathe through gills, amphibians through the skin, birds through air sacs and mammals through the lungs.
Organs of reproduction are the same in all the animals, though the mode of reproduction may vary.
So, the correct option is C.

All vertebrates carry _______without exception.

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. RBC

  2. Bony vertebral column

  3. Glandular skin

  4. All of the above

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Correct Option: A
Explanation:

A. RBCs or the red blood cells contain a red coloured pigment due to the presence of iron) called haemoglobin which carries oxygen to different parts of the body.

  • It is present in all the vertebrates irrespective of its size.
B. The vertebral column is present only in higher vertebrates in all the stages of development whereas, in lower vertebrates, the notochord is present in the larval stage and are not present in adults.
C. Only a few vertebral animals have glandular skin. Eg- frogs (have glandular moist skin).
So, the correct answer is 'RBC'.

Two adjoining vertebrae articulates at how many joint with each other.

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. One

  2. Two

  3. Three

  4. Four

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Correct Option: A

Vertebrates have

zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

  1. Dorsal tubular nerve cord

  2. Ventrally situated heart

  3. Body cavity with alimentary canal

  4. All of the above

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Correct Option: D
Explanation:

Vertebrates are the organisms which are characterized by the presence of the nerve cord. Vertebrates have the dorsal hollow nerve cord. This nerve cord develops into the central nervous system.
All vertebrates have a ventrally placed heart. The heart may be 2,3 or 4 chambered. Most of the organisms have closed circulatory system.
All vertebrates have a body cavity with alimentary canal. The alimentary canal starts at the mouth and ends at anus. 

Thus, the correct answer is option D.