Tag: zoology

Questions Related to zoology

Common characteristic of all vertebrates, without exception is

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

  1. Presence of exoskeleton

  2. Presence of well developed skull

  3. Two pairs of functional appendages

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

Show answer
Correct Option: B
Explanation:

All vertebrates have a living endoskeleton. The characteristic of vertebrates without exception is the presence of a brain. The brain is set inside a bony box called as the cranium. Cranium is made up of eight bones. It protects the human brain from mechanical injury.
Therefore, the correct answer is option B.

The most primitive vertebrates are ______________.

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

  1. Ostracoderms

  2. Cephalochordates

  3. Placoderms

  4. Cyclostomes

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Correct Option: A

Part of Herdmania embedded in sand is

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

  1. Test

  2. Foot

  3. Tunic

  4. Both A and C

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Correct Option: B

Which is not found in vertebrates?

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

  1. Gill opening

  2. Bilateral symmetry

  3. Cnidoblasts

  4. Body scales

Show answer
Correct Option: C
Explanation:
A. Gill openings are called gill slits. Gill slits are present in vertebrates.
B. Vertebrates have bilateral symmetry, in which a lengthwise vertical plane divides the body into equal and opposite halves.
C. Cnidoblasts are the cells that contain stinging capsules and are found in Coelenterates.
D. Body scales are the appendages on the surface of the skin and are found in vertebrates.
Hence, Cnidoblasts are not found in vertebrates. So, the correct answer is 'Cnidoblasts'.

Vertebrates do not possess

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

  1. Dorsal heart

  2. Ventral heart

  3. Vertebral column

  4. Coelom

Show answer
Correct Option: A
Explanation:

  • The heart of vertebrates is ventrally placed.
  • The body of vertebrates consists of serially arranged vertebrae which comprises of a major part of their axial exoskeleton, the vertebral column or the backbone.
  • The coelom of vertebrates is large and well developed and it is of enterocoelous type.
Hence, vertebrates do not possess dorsal heart. So, the correct answer is 'Dorsal heart'.

Separated cells of two vertebrates are mixed up. They will

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

  1. Aggregate species-wise

  2. Aggregate tissue-wise

  3. Aggregate species-wise and then tissue-wise

  4. Aggregate species-wise and then reconstruct the animals.

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Correct Option: B

Heart pumps only impure blood in case of

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

  1. Sharks

  2. Whale

  3. Lizard

  4. Frog

Show answer
Correct Option: A
Explanation:
  • The heart pumps only impure blood in sharks. Sharks have a two-chambered heart which is an S-shaped tube. It has an atrium and ventricle. The blood is pumped by the heart through the afferent branchial arteries to capillaries in the gills, where the blood is oxygenated). 
  • The blood then flows through efferent branchial arteries, through the tissues of the body, and back to the heart in veins. Sharks have low blood pressures; the walls of the pericardium are rigid, creating suction within the pericardium to maintain the flow of blood. To circulate blood throughout their bodies, many sharks must swim continuously. 
  • The blood flow is similar to humans because blood is pumped by the heart to the rest of the body by arteries and returned to the heart by veins. 
  • A difference is that humans have 4-chambered hearts while sharks only have two chambers.

Which one of the following is an example of viviparous animal?

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

  1. Amphibians

  2. Bony fish

  3. Fish

  4. Shark

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Correct Option: D
Explanation:

Viviparous sharks give birth to live young. The number of pups in a litter ranges from 2-20 or more. For example, the Bull sharks, Whitetip reef shark, Lemon shark, Blue shark, Mako, Porbeagle, Salmon shark, the Silvertip shark, and Hammerheads.

Amphibians are oviparous because the young hatch after the egg is laid.
Bony fish and fish are oviparous in nature.

Herdmania is

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

  1. Sea purse

  2. Sea squirt

  3. Sea potato

  4. Both B and C

Show answer
Correct Option: B
Explanation:

Herdmania is an ascidian urochordate.

A) Sea purse is the egg case of a shark.
B) Sea squirt is another name for ascidian urochordates.
C) Sea potato is an echinoderm.
Answer is 'sea squirt'.

Find the incorrect statement.

zoology animal diversity - ii (phylum: chordata) vertebrates characteristics of vertebrates classification of organisms

  1. Lymphatic system is present in vertebrates and lymph is finally carried to the veins

  2. All vertebrates have a single heart, enclosed in pericardium

  3. Heart of fish receives only venous blood which is pumped into lungs for oxygenation

  4. Reptilian heart is arteriovenous heart that shows incomplete double circulation

Show answer
Correct Option: A