Biology Today - February 2018

39. In which one of the following, the genus name, its two
    characters and its phylum are not correctly matched?

Genus Name Characters Phylum

(a) 3LOD (i) Body unsegmented

(ii) Mouth with radula

Mollusca

(b) $VWHULDV (i) Spiny skinned

(ii) Water vascular

system

Echino-

dermata

(c) 6\FRQ (i) Pore bearing

(ii) Canal system

Porifera

(d) 3HULSODQHWD (i) Jointed appendages

(ii) Ventral heart

Arthropoda

40. Which of the following is a wrong statement?
    (a) +\GUD egest through mouth and respire through
    general body surface.
    (b) Starfish has anus on aboral surface along with
    madreporite.
    (c) Platyhelminthes are triploblastic, pseudocoelomate
    and bilaterally symmetrical.
    (d) $HGHVmosquito act as a vector of virus causing dengue
    fever.


41. Which of the following is characteristic cell of 6\FRQ?
    (a) Flame cell (b) Choanocyte
    (c) Chloragogen cell (d) Interstitial cell


42. $GDPVLD, an aquatic metazoan is characterised by which of
    the following group of features?
    (a) Fresh water, diploblastic and biradial symmetry
    (b) Marine, triploblastic, eucoelomate and radial symmetry
    (c) Marine, diploblastic, acoelomate and with biradial
    symmetry
    (d) Fresh water, diploblastic, schizocoelomate and radially
    symmetrical


43. $VFDULV is called common round worm because of
    (a) spherical shape (b) circular in outline
    (c) spherical in T.S. (d) circular in T.S.


44. The given diagram represents T.S. of germinal layers. How
    many of the following animals show this type of
    organisation?
    $VFDULV:XFKHUHULD, Pin worm,
    Earthworm, Flat worm, Clam
    worm, )DVFLROD, $QF\FORVWRPD
    (a) 4
    (b) 3
    (c) 2
    (d) 1
    45. Maximum number of named species are found in which of
    the following class of organisms?
    (a) Molluscs (b) Insecta
    (c) Arthropoda (d) Cephalopoda
    46. Most distinguishing feature of echinodermata is
    (a) presence of canal system
    (b) enterocoelom
    (c) water vascular system `
    (d) haemal and perihaemal system, only.
    47. Match column I with column II and find the correct match.
    Column I Column II
    A. Porifera (i) Proboscis gland
    B. Hemichordata (ii) Syncytial epidermis
    C. Aschelminthes (iii) Chloragogen cells
    D. Ctenophora (iv) Comb plates
    E. Annelida (v) Choanocytes
    (a) A-(v), B-(i), C-(iii), D-(iv),E-(ii)
    (b) A-(v), B-(i), C-(ii), D-(iv),E-(iii)
    (c) A-(v), B-(i), C-(iv), D-(ii), E-(iii)
    (d) A-(v), B-(i), C-(iii), D-(ii), E-(iv)
    48. Character shared by hook worm, pin worm and filarial
    worm
    (a) pseudocoelomates
    (b) circular in outline in T.S.
    (c) syncytial epidermis
    (d) all of these.
    49. Tissue level body organisation found in
    (a) bath sponge (b) starfish
    (c) jelly fish (d) silver fish.
    50. Alternation of two morphological different diploid
    generation in life cycle is called
    (a) metagenesis (b) metamorphosis
    (c) metastasis (d) none of these.

ANSWER KEY

1. (d) 2. (a) 3. (a) 4. (c) 5. (b)


2. (d) 7. (b) 8. (c) 9. (a) 10. (a)


3. (c) 12. (b) 13. (a) 14. (c) 15. (a)


4. (c) 17. (a) 18. (a) 19. (a) 20. (a)


5. (d) 22. (d) 23. (d) 24. (c) 25. (b)


6. (c) 27. (a) 28. (b) 29. (c) 30. (a)


7. (d) 32. (a) 33. (b) 34. (d) 35. (a)


8. (c) 37. (d) 38. (a) 39. (d) 40. (c)


9. (b) 42. (c) 43. (d) 44. (a) 45. (b)


10. 
    

    (c) 47. (b) 48. (d) 49. (c) 50. (a)