Biology Today — January 2018

(Jacob Rumans) #1

Statement 2 : Pneumatophores help the plant to get
oxygen for respiration.
(a) Both statements 1 and 2 are true and 2 is the correct
explanation of 1.
(b) Both statements 1 and 2 are true but 2 is not the
correct explanation of 1.
(c) Statement 1 is true but statement 2 is false.
(d) Both statements 1 and 2 are false.



  1. The modified structure of stem that possesses vascular
    cylinder surrounded by a bark of thick walled cells is
    (a) thorn (b) prickle
    (c) bristle (d) spine.

  2. Refer to the given figures X, Y and Z and select the correct
    option regarding them.


X Y Z
(a) X shows an inflorescence in which sessile flowers are
borne on elongated peduncle in centripetal fashion.
(b) Y type of inflorescence is found in Family Gramineae.
(c) ‘Z’ is a modified spike with fleshy peduncle and a
large coloured bract called spathe.
(d) X is commonly found in Betula and Quercus.


  1. Scape is found in which of the given plants?
    (a) Banana (b) Bamboo
    (c) Sugarcane (d) Palm

  2. The leaf lamina is modified into a pitcher to store rainwater
    in
    (a) Nepenthes (b) Sarracenia
    (c) Utricularia (d) Dischidia.

  3. Which of the following does not show reticulate venation?
    (a) Zizyphus (b) Livistonia
    (c) Ricinus (d) Dioscorea

  4. Consider the given figure and select the correct statements
    related to it.


I. These are arched runners which can cross over small
obstacles.
II. It has one or more nodes possessing scale leaves
and axillary buds.

III. The tip of the stem grows below the level of ground.
I V. It is found in Colocasia.
(a) I and IV (b) II and IV
(c) I, II and III (d) I, II, III and IV


  1. Which of the following


A

B

C

statements is correct with
respect to the given figure
showing different zones of
a typical root?
(a) Zone B mainly helps
in absorption of
water.
(b) Quiescent centre is present in zone B.
(c) Zone A is most suitable for anatomical studies of
root.
(d) Differentiation of cells can be observed in zone C.


  1. When the leaflets are arranged laterally all along the length
    of rachis like the plumes of a feather, such a leaf is called
    (a) multifoliate palmately compound leaf
    (b) pinnately compound leaf
    (c) bifoliate palmately compound leaf
    (d) unifoliate palmately compound leaf.

  2. Match the columns and select the correct option from the
    given codes.
    Column I Column II
    A. Leaflet tendrils (i) Tropaeolum majus
    B. Rachis tip tendrils (ii) Gloriosa superba
    C. Stipular tendrils (iii) Lens culinaris
    D. Petiolar tendrils (iv) Lathyrus odoratus
    E. Leaf tip tendrils (v) Smilax
    (a) A-(iv), B-(v), C-(ii), D-(iii), E-(i)
    (b) A-(v), B-(iii), C-(ii), D-(iv), E-(i)
    (c) A-(iv), B-(iii), C-(v), D-(i), E-(ii)
    (d) A-(i), B-(iv), C-(v), D-(iii), E-(ii)

  3. Select the incorrect statement regarding racemose type of
    inflorescence.
    (a) The growing point seldom ends in a flower.
    (b) Flowers arise laterally and are acropetally or
    centripetally arranged.
    (c) The floral axis is either sympodial or multipodial.
    (d) Newly formed fruits are not protected by flowers.


ANSWER KEY



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

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

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

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

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

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