UPSC previous questions and answers zoology

UPSC previous questions and answers zoology
UPSC – IAS Zoology Solved Question Questions & Answers
UPSC Civil Services Zoology Preliminary Exam
1. The interspecific interaction between the termites and the protozoans (Trichonymphy sp.), present in the guts of termites is called
(a) Amensalism
(b) Commensalisms
(c) Parasitism
(d) Mutualism
Ans. (d)

2. Similarity in the appearance of two or more unpalatable species resulting over evolutionary time is called
(a) Mutual adaptation
(b) Batesian mimicry
(c) Mullerian mimicry
(d) Convergent mimicry
Ans. (c)

3. The pyramids of biomass are always inverted in
(a) Grassland ecosystem
(b) Forest ecosystem
(c) Pond ecosystem
(d) Desert ecosystem
Ans. (c)

4. Consider the following
1. Bandipur wildlife sanctuary
2. Manas wildlife sanctuary
3. Simlipal wildlife sanctuary
Which of the above are tiger reserves under the project tiger?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Ans. (d)

5. Thamin deer (Cervus eldi) is an inhabitant of
(a) Kanha National Park
(b) Keibul Lamjao National Park
(c) Bandipur Wildlife Sanctuary
(d) Periyar Wildlife Sanctuary
Ans. (b)

6. Which one of the following refers to the largest tiger reserve?
(a) Corbett
(b) Sariska
(c) Nagarjuna Sagar-Srisailam
(d) Kanha
Ans. (c)

7. Consider the following statements
1. In India, the Sangai is confined to Nagaland only.
2. Four-homed antelope (Tetracerus quadriocornis) exclusively lives in Indian sub-continent.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Ans. (a)


8. Consider the following statements
1. Pheromones are used to repel predators.
2. Mucus secreted by the snails’ acts as pheromone.
3. Certain steroid metabolites act as pheromones.
Which of the statements given above is/are correct?
(a) l and 2only
(b) l and 3 only
(c) 3 only
(d) 1, 2 and 3
Ans. (d)

9. Match List-I with List-II and select the correct answer using the code given below the lists:
List-I List-II
A. Temperature affects size of animals 1. Gloger’s rule
B. Temperature affects coloration of animals 2. Jordan’s rule
C. Temperature affects size of extremities of certain animals 3. Bergman’s rule
D. Temperature affects number of vertebrae in certain fish 4. Allen’s rule
Codes:
A B C D
(a) 3 1 4 2
(b) 3 4 1 2
(c) 2 4 1 3
(d) 2 1 4 3
Ans. (a)

10. Species which occupy similar niches in different geographical regions are called which one of the following?
(a) Ecotypes
(b) Ecological guilds
(c) Ecological equivalents
(d) Ecological determinants
Ans. (c)

11. Consider the following statements
1. In grassland ecosystem, the pyramid of biomass is upright in shape.
2. In pond ecosystem, the pyramid of biomass is inverted in shape.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(d) Neither 1 nor 2
(c) Both 1 and 2
Ans. (c)

12. Who among the following is associated with the description of Y-shaped or 2-channel energy flow model applicable to both terrestrial and aquatic ecosystems?
(a) Hardin
(b) Liebig
(c) Odum
(d) Shelford
Ans. (c)

13. Which of th following is one of the deep sea adaptations in animals?
(a) Laterally compressed body
(b) Bio-luminescence
(c) Streamlined body
(d) Light and spongy body
Ans. (b)

14. The Anopheles mosquito, which is a temporary blood sucking parasite of man, is itself parasitized by Plasmodium. This is an example of which one of the following?
(a) Ectoparasitism
(b) Parasitoid
(c) Obligatory parasitism
(d) Hyperparasitim
Ans. (d)

15. A sucker fish attached to the belly of spark gets a free ride and feeds on the left-overs from shark. What is this type of inter-specific animal relationship called?
(a) Parasitism
(b) Commensalisms
(c) Protocooperation
(d) Mutualism
Ans. (b)

16. Consider the following aquatic adaptations in animals
1. Loss of pinna
2. Loss of hind limb
3. Presence of thick blubber
4. Presence of swim bladder
Which of the above are observed in whales?
(a) 1, 2 and 3 only
(b) 2 and 3 only
(c) 3 and 4 only
(d) 1, 2, 3 and 4
Ans. (b)

17. According to Version 3.1: IUCN (2001) Red List, a ‘Threatened’ category includes which species?
(a) Extinct in wild (EW), Critically Endangered (CR) and Endangered (EN)
(b) CR, EN and Vulnerable (VU)
(c) Data Deficient (DD), Least Concern (LC) and EN
(d) Not Evaluated (NE), DD and VU
Ans. (b)

18. What is the scientific name of endangered Brow-antlered deer?
(a) Cervus unicolor
(b) Cervus eldi eldi
(c) Cervus elephus
(d) Cervus duvaucelii
Ans. (b)

19. Circadian rhythm is a biological rhythm involving which one of the following?
(a) Exactly 24 hours
(b) About 24 hours
(c) 15.days corresponding full moon and new moon
(d) 30 days corresponding full moon
Ans. (b)

20. Consider the following statements:
Eutrophication of lakes results in
1. Increase in species richness.
2. Increase in detritus content.
3. Increase in nitrate constant.
Which of the statements given above are correct?
(a) 1, 2 and 3
(b) l and 2 only
(c) 3 only
(d) 2 and 3only
Ans. (a)

21. Which one of the following statements is not correct?
(a) India is the only country where Cervus duvaucelii duvaucelii
(b) Cervus unicolor niger is the largest deer found in India.
(c) Only the females of Moschus Moschus moschiferus carry the mush
(d) Antelope cervicapra can run with a speed of mare than 60 km per hour
Ans. (c)

22. Consider the following protected areas:
1. Indravati
2. Melghat
3. Periyar
4. Valmiki
Which of the above are the Project Tiger Reserves in India?
(a) 1 and 2
(b) 1, 3 and 4
(c) 2, 3 and 4
(d) 1, 2, 3 and 4
Ans. (d)

23. Which one of the following is an example of ex situ conservation?
(a) Sanctuary
(b) National Park
(c) Biosphere Reserve
(d) Zoological Park
Ans. (d)

24. In India, Environment (Protection) Act was enacted in which year?
(a) 1966
(b) 1976
(c) 1986
(d) 1996
Ans. (c)

25. What is the rate of storage of organic matter in plant tissue in excess of respiratory utilization by the plants during the period of measurement called?
(a) Secondary productivity
(b) Net community productivity
(c) Gross primary productivity
(d) Net primary productivity
Ans. (d)

26. With reference to ecological niche consider the following statements:
1. Often, within the same species, different stages in the organism’s life history occupy different niches.
2. In some species, niche segregation may occur between sexes.
3. When niches of two species overlap, it always results in the elimination of one species.
Which of the statements given above is/art correct?
(a) l and 2 only
(b) l and 3 only
(c) 2 only
(d) 1, 2 and 3
Ans. (b)

27. Among the following which one is the most productive ecosystem in terms of mean net primary productivity (g/m2 /yr)?
(a) Tropical rain forest
(b) Tropical seasonal forest
(c) Swamp and marsh
(d) Coral reef
Ans. (d)

28. Which one of the following theories explains the formation of pseudopodia in Amoeba?
(a) Theory of Ulehia and Krijsman
(b) Surface tensions theory and change of viscosity theory
(c) Screw theory of Butschli
(d) Gliding movement theory
Ans. (b)

29. The sexual cycle of Plasmodium is completed in
(a) liver tissue
(b) red blood corpuscles
(c) the gut of the mosquito
(d) the salivary glands of the mosquito
Ans. (c)

30. The correct pathway of water current in Sycon is
(a) ostia-osculum-spongocoel-radial canal-outside
(b) osculum-incurrent canal-prosopyles-ostia-outside
(c) apopyles-radial canal-prosopyles-osculum-outside
(d) ostia-prosopyles-radial canal-spongocoel-osculumoutside
Ans. (d)

31. The coelenteron of Hydra is
(a) coelomic cavity
(b) pseudocoelomic cavity
(c) perivisceral cavity
(d) gastrovascular cavity
Ans. (d)

32. Match list-I with list-II and select in correct answer using the codes given below the lists:
List-I List-II
A. Taenia 1. Hexacanth
B. Obelia 2. Glochidium
C. Unio 3. Planula
D. Balanoglossus 4. Tornaria
5. Miracidium
Codes:
A B C D
(a) 1 2 3 5
(b) 3 2 1 5
(c) 1 3 2 4
(d) 2 1 3 4
Ans. (c)

33. Roundworms differ from the flatworms in that the roundworms have a
(a) longitudinal nerve cord
(b) segmented body
(c) pseudocoel
(d) larval stage in the life history
Ans. (c)

34. The botryoidal tissue of leech is a/an
(a) connective tissue
(b) mesodermal tissue
(c) epithelial tissue
(d) mesenchymatic tissue
Ans. (a)

35. The typhlosole in the earthworm is functionally associated with
(a) secretion of digestive enzymes
(b) killing bacteria in intestine
(c) mastication of food
(d) increasing the absorptive surface arc
Ans. (d)

36. Sperm thecae in earthworm are used for
(a) protection of sperms
(b) generation of sperms
(c) stimulation of ovum
(d) storing of spermatozoa
Ans. (d)

37. Match list-I with list-II and select the correct answer using the codes given below the lists:
List-I (Organs of respiration) List-II (Animals)

A. Book-lungs 1. Mosquito larvae
B. Body wall 2. Pila
C. Respiratory siphon 3. Scorpion
D. Pulmonary sac 4. Earthworm
Codes:
A B C D
(a) 1 2 3 4
(b) 4 3 2 1
(c) 2 3 4 1
(d) 3 4 1 2
Ans. (d)

38. Which one of the following organs is associated with the digestive system of Pila?
(a) Hastate plate
(b) Radula
(c) Gizzard
(d) Velum
Ans. (b)

39. Which one of the following pairs is correctly matched?
(a) Spicules - Amoeba
(b) Suckers - Ascaris
(c) Malpighian tubules - Earthworm
(d) Velum - Amphioxus
Ans. (d)

40. In bivalves, the structure which secretes the pearl is
(a) periostracum layer
(b) prismatic layer
(c) nacreous layer
(d) nacreous gland
Ans. (c)

41. Consider the following statements about Protozoa. Its classification is based on
(i) Locomotory organelle
(ii) Mode of feeding
(iii) Size and shape
(iv) Mode of reproduction
Of these statements:
(a) i alone is correct
(b) i and iii are correct
(c) ii alone is correct
(d) ii and iii are correct
Ans. (a)

42. Match list-I with list-II and select the correct answer using the codes given below the lists:
List-I (Animals) List-II (Organs of locomotion)
A. Paramecium 1. Parapodia
B. Mussels 2. Flagellum
C. Trypanosoma 3. Foot
D. Tube worms 4. Tube feet
Codes:
A B C D
(a) 2 3 1 4
(b) 1 3 2 4
(c) 4 3 2 1
(d) 2 1 4 3
Ans. All Options Wrong

43. Glass sponges belong to the class
(a) Demospongiae
(b) Tetractinellidea
(c) Hexactinellida
(d) Calcarea
Ans. (c)

44. Match list-I with list-II and select the correct answer using the codes given below the lists:
List-I (Larval forms) List-II (Corresponding adults)
A. Planula 1. Coelenterata
B. Mullet’s larva 2. Mollusca
C. Tornaria 3. Holothuroidea
D. Auricularia 4. Hemichordata
5. Turbellaria
Codes:
A B C D
(a) 1 5 4 3
(b) 2 5 3 4
(c) 4 1 2 5
(d) 5 4 1 3
Ans. (a)

45. Endoparasitic worms with several suckers and hooks on opisthaptor are included in the class
(a) Cestoda
(b) Digenea
(c) Monogenea
(d) Turbellaria
Ans. (a)

46. The most characteristic feature of Annelida is
(a) the presence of pseudocoel
(b) the spiral determinate cleavage
(c) metameric segmentation
(d) radial symmetry
Ans. (c)

47. On the basis of increasing number of legs possessed by animals, which one of the following indicates the correct sequence?
(a) Grasshopper, palamnaeus, crayfish, millipede
(b) Palainnaeus, grasshopper, crayfish, millipede
(c) Crayfish, plamnaeus, grasshopper, millipede
(d) Millipede, crayfish, grasshopper, palamnaeus
Ans. (a)

48. Bilateral symmetry in a certain group of phylum-Mollusca is lost due to
(a) rotation
(b) torsion
(c) reversion and rotation
(d) expansion and torsion
Ans. (b)

49. Which one of the following echinoderms possesses a respiratory tree?
(a) Sea cucumber
(b) Star fish
(c) Feather star
(d) Sea urchin
Ann. (a)


50. The animal group having radically symmtrica1 adult but bilaterally symmetrical larva is
(a) Porifera
(b) Coelenterata
(c) Annelida
(d) Echinodermata
Ans. (d)