Q.1
Choose the mismatched pair: {Question submitted by Adhithyan js}
  • a) Salpa and Doliolum – Urochordata
  • b) Branchiostoma – Cephalochordata
  • c) Chondrichthys – Fighting fish.
  • d) Petromyzon – Cyclostomata
Q.2
Match the following: {Question submitted by Adhithyan js}
Column I Column II
a. Limbless reptiles Elephant
b. Jawless vertebrates. Lamprey
c. Flightless birds. Ichthyophis
d. Largest terrestrial animal Ostrich
e. Blind worm Bangarus
  • a) a - 2 , b-5 , c -4 , d-1 ,e -3
  • b) a - 5 , b-2 , c - 4 , d- 1 ,e - 3
  • c) a - 5 , b-2 , c - 1 , d- 4 ,e - 3
  • d) a - 5 , b-4 , c -2 , d-1 ,e -3
Q.3
Some anadromous migratory organisms enter into river for breeding. Examples for this are: {Question submitted by Adhithyan js}
  • a) Lampreys and Clarius.
  • b) Lampreys and Petromyzon
  • c) Betta and Pterophyllum
  • d) Labeo and Hippocampus
Q.4
Which of the following statements is true/false about the occurrence of notochord. (i) In amphioxus, notochord is persistent throughout their life. (ii) In Branchiostoma, notochord is present only in the larval tail. (iii) Vertebrates possess notochord during the embryonic period. (iv) In Ascidia and Salpa notochord extends from head to tail region. {Question submitted by Adhithyan js}
  • a) (i) and (ii) are true but (iii) and (iv) are false.
  • b) (ii) and (iii) are true but (i) and (iv) are false
  • c) (i) and (iii) are true but (ii) and (iv) are false
  • d) only (iii) is true and (i), (ii) and (iv) are false.
Q.5
Select the false statement about Cyclostomata. {Question submitted by Adhithyan js}
  • a) They are parasites on some fishes
  • b) They possess an elongated eel like body bearing 6-15 pairs of gill slits
  • c) They possess a sucking and circular mouth
  • d) Their cranium and vertebral column are bony with a persistent notochord
Q.6
Identify the class from the characters given below: (i) A tympanum represents the ear. (ii) Heart is three chambered. (iii) These are cold blooded animals. (iv) They are oviparous. (v) Development is indirect. {Question submitted by Adhithyan js}
  • a) Chondrichthys
  • b) Osteichthys
  • c) Amphibia
  • d) Reptilia
Q.7
Identify the flightless birds from the following: (i) Neophron   (ii) Aptenodytes   (iii) Psittacula (iv) Apteryx   (v) Struthio. {Question submitted by Adhithyan js}
  • a) (i), (ii), (iv) and (v)
  • b) (ii), (iv) and (v)
  • c) (iii), (iv) and (v)
  • d) (iv) and (v)
Q.8
Identify the organism from the following hints: (i) Freshwater inhabitant with streamlined body. (ii) Two chambered heart. (iii) Air bladder is present to regulate buoyancy. (iv) Four pairs of gills with operculum. {Question submitted by Adhithyan js}
  • a) Pristis
  • b) Trygon
  • c) Catla
  • d) Myxine
Q.9
Find out the correct match: {Question submitted by Adhithyan js}
  • a) Maccaca – Kangaroo
  • b) Canis – Dog
  • c) Eqqus – Flying fox
  • d) Panthera leo – tiger
Q.10
Find out the wrong statement about phylum Chordata. {Question submitted by Adhithyan js}
  • a) Animals belonging to phylum chordata are fundamentally characterised by the presence of a notochord, a ventral rigid nerve cord and single pharyngeal gill slits.
  • b) Chordates are bilaterally symmetrical, Triploblastic coelomates with organ system level of organisation
  • c) They possess a post anal tail and closed circulatory system
  • d) In Urochordata, notochord is present only in larval tail
Q.11
The right ovary, right oviduct and urinary bladder are absent in birds because: {Question submitted by Adhithyan js}
  • a) Only one ovary is necessary for reproduction
  • b) Ammonic wastes are converted as uric acid and cannot be stored in urinary bladder
  • c) It reduces body weight
  • d) To prevent migration
Q.12
Retention of larval characters even after sexual maturity is called Neoteny. Which larvae exhibit this phenomenon? {Question submitted by Adhithyan js}
  • a) Tadpole
  • b) Ammocoetes
  • c) Axolotl
  • d) Planula
Q.13
The position of mouth in bony fishes is mostly: {Question submitted by Adhithyan js}
  • a) Dorsal
  • b) Ventral
  • c) Terminal
  • d) Lateral
Q.14
Which of the following is not true about Chondrichthys? {Question submitted by Adhithyan js}
  • a) Mouth is located ventrally
  • b) Notochord is persistent throughout life
  • c) Teeth are modified placoid scales
  • d) Air bladder is present
Q.15
Which of the following group of animals represents poikilotherms? {Question submitted by Adhithyan js}
  • a) Pristis, Pterophyllum, Psittacula
  • b) Aptenodytes, Alligator, Ichthyophis
  • c) Salamandra, Catla, Bangarus
  • d) Balaenoptera, Macropus, Chameleon
Q.16
Select the correct statement: {Question submitted by Adhithyan js}
  • a) Protochordates are also known as tunicates
  • b) Protochordates have no coelom
  • c) All protochordates are marine
  • d) All protochordates have notochord extending from head to tail
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