Tag: classification of organisms

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

A common characteristic of all vertebrates is

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'. 
Multiple choice zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

Which one is not characteristic feature of subphylum vertebrata?

  1. Dorsal tubular nerve chord

  2. Ventral muscular heart

  3. Notochord in adult

  4. Kidneys

  5. Lateral appendages
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

Which of the following is a catfish?

  1. Labeo rohita

  2. Catla catla

  3. Cirrhina mrigala

  4. Wallago attu
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

Which of the following statements is true?

  1. All chordates are vertebrates

  2. All vertebrates are chordates

  3. Invertebrates possess a tubular nerve cord

  4. Non-chordates have a vertebral column
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

Pectoral fins are enlarged in

  1. Hippocampus

  2. Exocoetus

  3. Coccosteus

  4. Scoliodon
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

Glomerular kidney occurs in fish

  1. Tilapia

  2. Cirrhinus

  3. Sphyrna

  4. Exocoetus
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice zoology biodiversity and its classifications vertebrates characteristics of vertebrates classification of organisms

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

  1. Notochord

  2. Vertebral column

  3. Organs of respiration

  4. Organs of reproduction
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

All vertebrates carry _______without exception.

  1. RBC

  2. Bony vertebral column

  3. Glandular skin

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

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

  1. One

  2. Two

  3. Three

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

Two adjoining vertebrae articulate with each other at three distinct joints. These include two facet joints (zygapophyseal joints) located dorsally and one intervertebral disc joint located ventrally between the vertebral bodies.

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

Vertebrates have

  1. Dorsal tubular nerve cord

  2. Ventrally situated heart

  3. Body cavity with alimentary canal

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