Tag: zoology

Questions Related to zoology

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

Show answer
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

Show answer
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

Show answer
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

Show answer
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. 

The feature common to all chordates is

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

  1. Presence of gill slits throughout the life

  2. Ventral solid nerve cord

  3. Presence of amnion

  4. Dorsal tubular hollow nerve cord

Show answer
Correct Option: D
Explanation:
Chordates are the group of animals which possess a notochord. They have a tubular hollow and dorsal nerve cord. The notochord is the rod like structure. It is made up of cartilage and extends along the length of the body. In certain groups, the notochord forms the tail like structure which helps in swimming in case of fishes. There are presence of pharyngeal slits. There is an endostyle and a post anal tail for at least some period of their life.
Thus, the correct answer is option D. 

Vertebrates are mainly divided into _____ groups

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

  1. Four

  2. Three

  3. Five

  4. Two

Show answer
Correct Option: C
Explanation:

  • Vertebrates are animals that have a backbone or spinal column, also called vertebrae.
  • The five most well-known classes of vertebrates are mammals, birds, fish, reptiles, amphibians. They belong to the phylum Chordata.
So, the correct answer is 'Five'.

Vertebral column is found in ________________. 

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

  1. Arthropoda

  2. Porifera

  3. Both A and B

  4. Vertebrates

Show answer
Correct Option: D
Explanation:

The vertebral column, also known as the backbone or spine, is a bony skeletal structure found in vertebrates. It is formed from individual bones called vertebrae, which houses the spinal canal, a cavity that encloses and protects the spinal cord. Therefore, (d) is the correct answer. 

Which of the following is a distinct character of chordates?

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

  1. Chorda dorsalis

  2. Cephalization

  3. Claws

  4. Pharyngotomy

Show answer
Correct Option: A
Explanation:
Chorda dorsalis is notochord, which is a rod-shaped body found in embryos of all chordates. It is composed of cells derived from the mesoderm and defines the primitive axis of the embryo.
Cephalization is whereby nervous tissue over many generations, becomes concentrated towards one end of an organism, observed throughout evolutionary advancement in phylum Echinodermata.
Claws are curved, pointed appendage, found at the end of a toe or finger in most amniotes like mammals, reptiles and birds.
Therefore, the correct answer is option A.

Vertebral column is derived from which of the following structures?

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

  1. Notochord

  2. Dorsal nerve cord

  3. Ventral nerve cord

  4. Outgrowth of cranium

Show answer
Correct Option: A
Explanation:

All chordates are characterised by three primary chordate features the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits. The notochord, later on, gives rise to a bony vertebral column, which surrounds and protects the spinal cord. So, the correct answer is option B.