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Topic Question Set

Q 1 :

Consider the following statements.                   [2024]

 

A. Annelids are true coelomates.
B. Poriferans are pseudocoelomates.
C. Aschelminthes are acoelomates.
D. Platyhelminthes are pseudocoelomates.

 

Choose the correct answer from the options given below:

  • B only

     

  • A only

     

  • C only

     

  • D only

     

(2)

Annelids are true coelomates. In poriferans and platyhelminthes, the body cavity is absent, so they are called acoelomates. In aschelminthes, the body cavity is not lined by mesoderm; instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm, and thus they are called pseudocoelomates.

 

Q 2 :

Match List I with List II.                          [2024]

List I List II
A. Pterophyllum I. Hag fish
B. Myxine II. Saw fish
C. Pristis III. Angel fish
D. Exocoetus IV. Flying fish

 

Choose the correct answer from the options given below:

  • A-II, B-I, C-III, D-IV

     

  • A-III, B-I, C-II, D-IV

     

  • A-IV, B-I, C-II, D-III

     

  • A-III, B-II, C-I, D-IV

     

(2)

Pterophyllum - Angel fish

Myxine - Hag fish

Pristis - Saw fish

Exocoetus - Flying fish

Q 3 :

Match List I with List II.                               [2024]

List I List II
A. Pleurobrachia I. Mollusca
B. Radula II. Ctenophora
C. Stomochord III. Osteichthyes
D. Air bladder IV. Hemichordata

 

Choose the correct answer from the options given below.

  • A-IV, B-II, C-III, D-I

     

  • A-II, B-I, C-IV, D-III

     

  • A-II, B-IV, C-I, D-III

     

  • A-IV, B-III, C-II, D-I

     

(2)

Pleurobrachia is a member of Phylum Ctenophora. Radula is file-like rasping organ found in the members of Phylum Mollusca for feeding. The members of Phylum Hemichordata have a rudimentary structure in the collar region called stomochord. Air bladder is present in the members of Phylum Osteichthyes, which regulates buoyancy.

 

Q 4 :

The following are the statements about non-chordates:                  [2024]

 

A. Pharynx is perforated by gill slits.
B. Notochord is absent.
C. Central nervous system is dorsal.
D. Heart is dorsal if present.
E. Post-anal tail is absent.

 

Choose the most appropriate answer from the options given below:

  • A and C only

     

  • A, B and D only

     

  • B, D and E only

     

  • B, C and D only

     

(3)

In non-chordates, gill slits are absent, and the central nervous system is ventral, solid, and double.

 

Q 5 :

Select the correct statements.                        [2023]

 

(A) Platyhelminthes are triploblastic pseudocoelomate and bilaterally symmetrical organisms.
(B) Ctenophores reproduce only sexually and fertilisation is external.
(C) In tapeworm, fertilisation is internal but sexes are not separate.
(D) Ctenophores are exclusively marine, diploblastic and bioluminescent organisms.
(E) In sponges, fertilisation is external and development is direct.

 

Choose the correct answer from the options given below:

  • (A), (C), and (D) only

     

  • (B), (C), and (D) only

     

  • (A) and (E) only

     

  • (B) and (D) only

     

(2)

Platyhelminthes are triploblastic, acoelomate, and bilaterally symmetrical organisms. In sponges, fertilisation is internal, and development is indirect.

 

Q 6 :

Match List I with List II.                   [2023]

List I List II
(A) Contractile vacuole (I) Asterias
(B) Water vascular system (II) Amoeba
(C) Canal system (III) Spongilla
(D) Flame cells (IV) Taenia

 

Choose the correct answer from the options given below:

  • (A)-(IV), (B)-(III), (C)-(I), (D)-(III)

     

  • (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

     

  • (A)-(III), (B)-(II), (C)-(I), (D)-(IV)

     

  • (A)-(II), (B)-(I), (C)-(III), (D)-(IV)

     

(4)

 

Q 7 :

The unique mammalian characteristics are:                 [2023]

  • Hairs, pinna, and indirect development

     

  • Pinna, monocondylic skull, and mammary glands

     

  • Hairs, tympanic membrane, and mammary glands

     

  • Hairs, pinna, and mammary glands

     

(4)

The unique mammalian characters are mammary glands (milk-producing glands), the presence of hair, and external ears or pinnae.

 

Q 8 :

Select the correct statements with reference to chordates.               [2023]

 

A. Presence of a mid-dorsal, solid, and double nerve cord.
B. Presence of a closed circulatory system.
C. Presence of paired pharyngeal gill slits.
D. Presence of a dorsal heart.
E. Triploblastic pseudocoelomate animals.

 

Choose the correct answer from the options given below:

  • B, D, and E only

     

  • C, D, and E only

     

  • A, C, and D only

     

  • B and C only

     

(4)

Chordates possess a dorsal, hollow, single nerve cord, a closed circulatory system, paired pharyngeal gill slits, a ventral muscular heart, and are triploblastic and coelomate animals.

 

Q 9 :

Exoskeleton of arthropods is composed of:                [2022]

  • Cutin

     

  • Cellulose

     

  • Chitin

     

  • Glucosamine

     

(3)

The body of arthropods is covered by a chitinous exoskeleton.

 

Q 10 :

In which of the following animals, digestive tract has additional chambers like crop and gizzard?              [2022]

  • Corvus, Columba, Chameleon

     

  • Bufo, Balaenoptera, Bangarus

     

  • Catla, Columba, Crocodilus

     

  • Pavo, Psittacula, Corvus

     

(4)

The alimentary canal of birds has additional chambers, the crop and gizzard. Crop stores and softens the food, however, the gizzard helps in crushing and churning the food, e.g., Pavo, Psittacula, Corvus.

 

Q 11 :

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).            [2022]

 

Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
Reason (R): Notochord is replaced by vertebral column in the adult vertebrates.

 

In the light of the above statements, choose the appropriate answer from the options given below:

  • Both (A) and (R) are correct and (R) is the correct explanation of (A)

     

  • (A) is correct but (R) is not correct

     

  • (A) is not correct but (R) is correct

     

  • Both (A) and (R) are correct but (R) is incorrect explanation of (A)

     

(1)

Phylum Chordata possesses three sub-phyla (Urochordata, Cephalochordata, Vertebrata) which possess notochord at some stage of their life. The members of subphylum Vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. Thus, all vertebrates are chordates but all chordates are not vertebrates.

 

Q 12 :

Match the following.                                                                                         [2021]

List - I
List - II
(p) Physalia (i) Pearl oyster
(q) Limulus (ii) Portuguese man of war
(r) Ancylostoma (iii) Living fossil
(s) Pinctada (iv) Hookworm

 

Choose the correct answer from the options given below:

  • p-(i), q-(iv), r-(iii), s-(ii)

     

  • p-(ii), q-(iii), r-(i), s-(iv)

     

  • p-(iv), q-(i), r-(iii), s-(ii)

     

  • p-(ii), q-(iii), r-(iv), s-(i)

     

(4)

Physalia - Portuguese man of war

Limulus - Living fossil

Ancylostoma - Hookworm

Pinctada - Pearl oyster

 

Q 13 :

Which one of the following organisms bears hollow and pneumatic long bones?              [2021]

  • Ornithorhynchus

     

  • Neophron

     

  • Hemidactylus

     

  • Macropus

     

(2)

Endoskeleton of Neophron (vulture) that belongs to Class Aves is fully ossified (bony) and bears hollow and pneumatic long bones.

 

Q 14 :

Read the following statements.                                 [2021]

 

(A) Metagenesis is observed in helminths.
(B) Echinoderms are triploblastic and coelomate animals.
(C) Roundworms have organ-system level of body organization.
(D) Comb plates present in ctenophores help in digestion.
(E) Water vascular system is characteristic of echinoderms.

 

Choose the correct answer from the options given below:

  • (B), (C), and (E) are correct

     

  • (C), (D), and (E) are correct

     

  • (A), (B), and (C) are correct

     

  • (A), (D), and (E) are correct

     

(1)

Metagenesis is observed in Obelia, which belongs to the Phylum Coelenterata. Comb plates present in ctenophores help in locomotion.

 

Q 15 :

Match List - I with List - II.                                                               [2021]

List - I List - II
(p) Metamerism (i) Coelenterata
(q) Canal system (ii) Ctenophora
(r) Comb plates (iii) Annelida
(s) Cnidoblasts (iv) Porifera

 

Choose the correct answer from the options given below:

  • p-(iv), q-(i), r-(ii), s-(iii)

     

  • p-(iv), q-(iii), r-(i), s-(ii)

     

  • p-(iii), q-(iv), r-(i), s-(ii)

     

  • p-(iii), q-(iv), r-(ii), s-(i)

     

(4)

 

Q 16 :

Bilaterally symmetrical and acoelomate animals are exemplified by                       [2020]

  • Ctenophora

     

  • Platyhelminthes

     

  • Aschelminthes

     

  • Annelida

     

(2)

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

 

Q 17 :

Match the following columns and select the correct option.                [2020]

Column-I Column-II
(A) 6-15 pairs of gill slits (i) Trygon
(B) Heterocercal caudal fin (ii) Cyclostomes
(C) Air bladder (iii) Chondrichthyes
(D) Poison sting (iv) Osteichthyes

 

Choose the correct answer:

  • A-(ii), B-(iii), C-(iv), D-(i)

     

  • A-(iii), B-(iv), C-(i), D-(ii)

     

  • A-(iv), B-(ii), C-(iii), D-(i)

     

  • A-(i), B-(iv), C-(iii), D-(ii)

     

(1)

 

Q 18 :

Which of the following statements are true for the Phylum Chordata?             [2020]

(A) In Urochordata, notochord extends from head to tail, and it is present throughout their life.
(B) In Vertebrata, notochord is present during the embryonic period only.
(C) Central nervous system is dorsal and hollow.
(D) Chordata is divided into 3 subphyla: Hemichordata, Tunicata, and Cephalochordata.

 

  • (D) and (C)

     

  • (C) and (A)

     

  • (A) and (B)

     

  • (B) and (C)

     

(4)

In Urochordata, notochord is present only in the larval tail. Phylum Chordata is divided into three subphyla: Urochordata or Tunicata, Cephalochordata, and Vertebrata.

 

Q 19 :

Match the following columns and select the correct option.                [2020]

Column-I Column-II
(A) Gregarious, polyphagous pest (i) Asterias
(B) Adult with radial symmetry and larva with bilateral symmetry (ii) Scorpion
(C) Book lungs (iii) Ctenoplana
(D) Bioluminescence (iv) Locusta

 

  • A-(i), B-(iii), C-(ii), D-(iv)

     

  • A-(iv), B-(i), C-(ii), D-(iii)

     

  • A-(iii), B-(ii), C-(i), D-(iv)

     

  • A-(ii), B-(i), C-(iii), D-(iv)

     

(2)

 

Q 20 :

Match the following organisms with respective characteristics.                   [2019]

Organisms Characteristics
(A) Pila (i) Flame cells
(B) Bombyx (ii) Comb plates
(C) Pleurobrachia (iii) Radula
(D) Taenia (iv) Malpighian tubules

 

Select the correct option from the following:

  • A-(iii), B-(ii), C-(iv), D-(i)

     

  • A-(iii), B-(ii), C-(i), D-(iv)

     

  • A-(iii), B-(iv), C-(ii), D-(i)

     

  • A-(ii), B-(iv), C-(iii), D-(i)

     

(3)

The buccal cavity of Pila (apple snail) possesses a rasping organ, radula, with a transverse row of teeth for cutting grass. Bombyx (silk moth), an insect, has Malpighian tubules as excretory organs. Pleurobrachia is a ctenophore having eight ciliary plates called comb plates. Taenia is a platyhelminth having flame cells for excretion and osmoregulation.

 

Q 21 :

Match the following genera with their respective phylum.                        [2019]

Genera Phylum
(1) Ophiura (i) Mollusca
(2) Physalia (ii) Platyhelminthes
(3) Pinctada (iii) Echinodermata
(4) Planaria (iv) Coelenterata

 

Select the correct option:

  • (1)-(iv), (2)-(i), (3)-(iii), (4)-(ii)

     

  • (1)-(iii), (2)-(iv), (3)-(i), (4)-(ii)

     

  • (1)-(i), (2)-(iii), (3)-(iv), (4)-(ii)

     

  • (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i)

(2)

 

Q 22 :

Which of the following animals does not undergo metamorphosis?                   [2018]

  • Earthworm

     

  • Tunicate

     

  • Moth

     

  • Starfish

     

(1)

Metamorphosis is the process of transformation of an immature larva into an adult form in two or more distinct stages. Animals that undergo metamorphosis are said to have indirect development, e.g., tunicates, moth, starfish, etc. In the case of earthworm, development is direct which means no larval stage is present and hence, there is no metamorphosis.

 

Q 23 :

Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system.                [2018]

  • Amphibia

     

  • Reptilia

     

  • Aves

     

  • Osteichthyes

     

(3)

The alimentary canal of birds has additional chambers, the crop and gizzard. The crop stores and softens the food, however, the gizzard helps in crushing and churning the food, e.g., Pavo, Psittacula, Corvus.

 

Q 24 :

Which one of these animals is not a homeotherm?                           [2018]

  • Macropus

     

  • Chelone

     

  • Camelus

     

  • Psittacula

     

(2)

Homeotherms are the animals that maintain constant body temperature, irrespective of surrounding temperature, by metabolic activity, e.g., birds and mammals. Turtle (Chelone) belongs to Class Reptilia and is poikilothermic or cold-blooded.

 

Q 25 :

Important characteristic that hemichordates share with chordates is                      [2017]

  • Ventral tubular nerve cord

     

  • Pharynx with gill slits

     

  • Pharynx without gill slits

     

  • Absence of notochord

     

(2)

An important characteristic that hemichordates and chordates share is the presence of pharyngeal gill slits. Gill slits are dorsal in position in hemichordates, whereas they are lateral in chordates.

 

Q 26 :

Which among these is the correct combination of aquatic mammals?                    [2017]

  • Dolphins, Seals, Trygon

     

  • Whales, Dolphins, Seals

     

  • Trygon, Whales, Seals

     

  • Seals, Dolphins, Sharks

     

(2)

Whales, dolphins, and seals are examples of aquatic mammals. Trygon and sharks are cartilaginous fishes.

 

Q 27 :

Which of the following represents the order of 'Horse'?                       [2017]

  • Perissodactyla

     

  • Caballus

     

  • Ferus

     

  • Equidae

     

(1)

Perissodactyla represents the order of horse. Equidae is the family, caballus is the subspecies, whereas E. ferus is the species of horse.

 

Q 28 :

In case of poriferans, the spongocoel is lined with flagellated cells called                 [2017]

  • Oscula

     

  • Choanocytes

     

  • Mesenchymal cells

     

  • Ostia

     

(2)

Spongocoel is the central body cavity of the sponges. It is lined by highly specialized flagellated cells called choanocytes.

 

Q 29 :

Choose the correct statement.                             [2016]

  • All mammals are viviparous.

     

  • All cyclostomes do not possess jaws and paired fins.

     

  • All reptiles have a three-chambered heart.

     

  • All pisces have gills covered by an operculum.

     

(2)

Ornithorhynchus and Tachyglossus are oviparous mammals. Crocodile is a reptile that possesses a four-chambered heart. In cartilaginous fish (except Chimaera), gills are not covered by an operculum.

 

Q 30 :

Which one of the following characteristics is not shared by birds and mammals?                     [2016]

  • Viviparity

     

  • Warm-blooded nature

     

  • Ossified endoskeleton

     

  • Breathing using lungs

     

(1)

All birds are oviparous, while all mammals except Ornithorhynchus (duck-billed platypus) and Echidna or Tachyglossus (spiny anteater) are viviparous.