Biology Today — December 2017

A B C
(a) Spadix Corymb Catkin
(b) Spike Raceme Catkin
(c) Spikelet Corymbose Spadix
(d) Capitulum Corymb Spike

7. Refer to the given figures of leaves and select the option

which correctly identifies the type of venation in them.

X Y Z

X Y Z

(a) Multicostate

convergent

reticulate

Unicostate

divergent

parallel

Multicostate

convergent

parallel

(b) Multicostate

divergent

reticulate

Unicostate

convergent

reticulate

Multicostate

divergent parallel

(c) Multicostate

divergent

reticulate

Multicostate

convergent

parallel

Multicostate

divergent parallel

(d) Unicostate

divergent

reticulate

Multicostate

divergent

parallel

Multicostate

divergent

reticulate

8. Select the incorrect statements regarding various forms of

stem.

I. The branched, erect and weak cylindrical stem with

scars and remnants of fallen leaves is called caudex.

II. Jointed stem with solid prominent nodes and hollow

internodes is called culm.

III. A leafy shoot bearing flowers is called scape.

IV. In reduced stem, nodes and internodes are not

distinguishable.

(a) I and III only (b) II and IV only

(c) II and III only (d) I, II and IV only

9. Which of the following is not the characteristic of Family
   Fabaceae?
   (a) Petals have vexillary aestivation.
   (b) Inflorescence is racemose type.
   (c) Flower is actinomorphic.
   (d) Gynoecium is monocarpellary with unilocular ovary.


10. Select the option which correctly identifies the type of fruit

found in given plants (i) – (iv).

(i) Castor (ii) Lemon

(iii) Zizyphus (iv) Banyan

(i) (ii) (iii) (iv)

(a) Sorosis Drupe Pome Pepo

(b) Syconus Amphisarca Berry Lomentum

(c) Regma Achene Nut Follicle

(d) Regma Hesperidium Drupe Syconus

11. Identify the labels A – D from the
    given figure and select the correct
    statements regarding them.
    I. Maximum water absorption
    occurs in A region.
    II. C is the region of elongation
    that increases the length of
    root.
    III. The external cells of B
    absorbs water and mineral
    salts from the soil.
    IV. D lubricates the passage of root through the soil and
    protects region C.
    (a) I and III only
    (b) II and III only
    (c) I, III and IV only
    (d) I, II and III only


12. It is a green stem of limited growth which originates in
    the axil of scale leaf and has taken over the function of
    photosynthesis from the leaves. It is
    (a) phylloclade of Opuntia
    (b) phyllode of Acacia
    (c) cladode of Ruscus
    (d) offset of Pistia.


13. Read the given characteristics observed in a leaf.
    I. The leaflets are borne laterally on an elongated axis
    called rachis, which represents the midrib or lateral
    vein of leaf.
    II. The leaflets are odd in number borne in opposite pairs
    with a terminal unpaired leaflet.
    Select the option which correctly identifies the type of leaf.
    (a) Bipinnate compound leaf
    (b) Paripinnate compound leaf
    (c) Tripinnate compound leaf
    (d) Imparipinnate compound leaf


14. Select the incorrect match.

Type of fruit Edible part

(a) Drupe – Mesocarp

(b) Syconus – Fleshy receptacle

(c) Pome – Pericarp

(d) Hesperidium – Placental hair