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Systematics and Classification of Animals

Description: GATE
Number of Questions: 15
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Tags: GATE Systematics and Classification of Animals
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Which of the following examples of living fossils belong to phylum of C. aspersum?

  1. Limulus and lamprey

  2. Neopilina and nautilus

  3. Limulus and platypus

  4. Echidna and platypus

  5. Neopilina and limulus

Show answer
Correct Option: B
Explanation:

Neopilina and nautilus: Both belong to phylum Mollusca, i.e. the phylum of C. aspersum.

Which of the following is a pair of amphibians that have no limbs?

  1. Ichthyophis and ureotyphus

  2. Salamender and necturus

  3. Hyla and alytes

  4. Ureotyphus and necturus

  5. Necturus and ichtyhyphis

Show answer
Correct Option: A
Explanation:

Ichthyophis and ureotyphus belong to order Apoda (limbless amphibians).

Which of the following classes of animal belongs to poikilothermy?

  1. Amphibia
  2. Aves
  3. Mammals
  4. Reptilia

  1. 1 and 2

  2. 1 and 4

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4

Show answer
Correct Option: B
Explanation:

A poikilotherm is an organism whose internal temperature varies considerably. Both amphibians as well as reptiles are poikilothermal animals.

Which of the following statements are not correct about the animals that belong to cordates?

  1. Notochord is present.
  2. Central nervous system is ventral, solid and double.
  3. Pharynx perforated by gill slits.
  4. Heart is dorsal.

  1. 1 and 2

  2. 1 and 3

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4

Show answer
Correct Option: D
Explanation:

In chordates, central nervous system is dorsal, hollow and single. Heart is ventral in chordates.

Which of the following phylum are classified on the basis of locomotive organs?

  1. Protozoa and Annelida

  2. Protozoa and Porifera

  3. Porifera and Coelentrata

  4. Annelida and Coelentrata

  5. Annelida and Porifera

Show answer
Correct Option: A
Explanation:

Basis of classification of phylum Protozoa and Annelida are locomotary organs.

Which one of the following pair of animals possesses siphoning type of mouth parts?

  1. Cockroach and grasshopper

  2. Bees and wasps

  3. Aphids and mosquitoes

  4. Butterflies and moths

  5. Bees and butterflies

Show answer
Correct Option: D
Explanation:

Butterflies and moths: Siphoning type of mouth parts.

Which of the following taxonomical terms are not given by Linnaeus?

  1. Phylum
  2. Class
  3. Order
  4. Family
  5. Genera
  6. Species

  1. 1, 2 and 3

  2. 1, 3 and 5

  3. 2, 3 and 4

  4. 3, 4 and 5

  5. 4, 5 and 6

Show answer
Correct Option: E
Explanation:

Terms ‘Family’, ‘Genera’ and ‘Species’ are given by John Ray not by Linnaeus.

Match the column – I with column – II and select the correct option ||| |---|---| |Column – I | Column – II| |A. Physalia|1. Brain coral| |B. Adamsia |2. Sea anemone| |C. Meandrin|3. Sea-fan| |D. Gorgonia|4. Portuguese man-of-war|

  1. A - 4, B - 3, C - 2, D - 1

  2. A - 2, B - 1, C - 4, D - 3

  3. A - 4, B - 2, C - 1, D - 3

  4. A - 3, B - 2, C - 4, D - 1

  5. A - 1, B - 2, C - 3, D - 4

Show answer
Correct Option: C
Explanation:

Physalia is also known as Portuguese man-of-war. Adamsia is also known as sea anemone. Meandrin is also known as brain coral. Gorgonia is also known as sea-fan.

Match the column – I (taxonomical term) with column – II (scientist who coined the term) ||| |---|---| |Column – I |Column – II| |A. Coelenterata|1. Grobben| |B. Platyhelmithes|2. Jonston| |C. Aschelminthes|3. Gegenbaur| |D. Mollusca|4. Leuckart|

  1. A - 2, B - 1, C - 3, D - 4

  2. A - 4, B - 3, C - 1, D - 2

  3. A - 2, B - 3, C - 4, D - 1

  4. A - 3, B - 2, C - 4, D - 1

  5. A - 1, B - 2, C - 3, D - 4

Show answer
Correct Option: B
Explanation:

This option is correct because all the terms are correctly matched with scientists. Term ‘Coelenterata’ is coined by Leuckart. Term ‘Platyhelmithes’ is coined by Gegenbaur. Term ‘Aschelminthes’ is coined by Grobben. Term ‘Mollusca’ is coined by Jonston.  

Non-nucleated erythrocytes is/are found in _______.

  1. bat
  2. camel
  3. kangaroo

  1. Only 1

  2. Only 2

  3. Only 3

  4. 1 and 2

  5. 2 and 3

Show answer
Correct Option: B
Explanation:

Non-nucleated RBCs are found in camels.

Match the column – I (taxonomical term) with column – II (scientist who coined the term) and select the correct option ||| |---|---| |Column – I |Column – II| |A. Protista|1. Sollas| |B. Protozoa|2. Haekel| |C. Porifera|3. Goldfus| |D. Parazoa|4. Robert Grant|

  1. A - 1, B - 2, C - 3, D - 4

  2. A - 3, B - 1, C - 4, D - 2

  3. A - 2, B - 3, C - 4, D - 1

  4. A - 3, B - 2, C - 4, D - 1

  5. A - 1, B - 2, C - 3, D - 4

Show answer
Correct Option: C
Explanation:

Term ‘Protista’ was coined by Haekel. Term ‘Protozoa’ was coined by Goldfus. Term ‘Porifera’ was coined by Robert Grant. Term ‘Parazoa’ was coined by Sollas.

Which of the following phylums possess open circulatory system?

  1. Mollusca
  2. Aschelminthes
  3. Annelida
  4. Arthropoda
  5. Chordata

  1. 1 and 4

  2. 1 and 5

  3. 2 and 4

  4. 2, 3 and 4

  5. 3, 4 and 5

Show answer
Correct Option: A
Explanation:

Mollusca – Circulatory system is open and lacunar type. Arthropoda – Circulatory system is open with dorsal heart.

Which one of the following is not a characteristic feature of sponges?

  1. Diploblastic body

  2. Presence of collar cells

  3. Aerobic respiration

  4. Flame cells as excretory organs

  5. Circulatory system absent

Show answer
Correct Option: D
Explanation:

In sponges, excretion takes place through general body cavity. 

Which of the following are correct about platyhelminthes?

  1. Radially symmetrical
  2. Triploblastic
  3. Acoelomate
  4. External fertilization

  1. 1 and 2

  2. 2 and 3

  3. 1, 2 and 3

  4. 1, 3 and 4

  5. 2, 3 and 4

Show answer
Correct Option: B
Explanation:

Flatworms are bilaterally symmetrical, triploblastic and acoelomate animals with organ level of organization.

Which of the following is/are characteristic(s) of organisms belonging to Phylum of flatworms?

  1. Bilaterally symmetrical, dorso-ventrally flattened and mostly un-segmented body
  2. Diploblastic animals
  3. Well developed blood vascular system

  1. Only 1

  2. 1 and 2

  3. 1 and 3

  4. 2 and 3

  5. Only 3

Show answer
Correct Option: A
Explanation:

Out of the given characteristics, only 1 is correct for organisms belonging to Phylum Platyhelminthes. Bilaterally symmetrical, dorso-ventrally flattened and mostly un-segmented body is characteristic feature of organisms belonging to Phylum Platyhelminthes or phylum of flatworms.

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