Question

Match column-I containing types of aestivation with their examples given in column-II and choose the correct option.
$\begin{array}{cccc}& \text{Column-I}& & \text{Column-II}\\ & \text{(Type of aestivation)}& & \text{(Examples)}\\ \text{A.}& \text{Valvate}& \text{I.}& \text{Cotton}\\ \text{B.}& \text{Twisted}& \text{II.}& \text{Calotropis}\\ \text{C.}& \text{Imbricate}& \text{III.}& \text{Bean}\\ \text{D.}& \text{Vexillary}& \text{IV.}& \text{Gulmohur}\end{array}$

• A. A – I; B – II; C – IV; D – III
• B. A – II; B – IV; C – I; D – III
• C. A – II; B – I; C – IV; D – III
• D. A – II; B – I; C – III; D – IV

Answer 1

The correct option is C A – II; B – I; C – IV; D – III

Aestivation is the arrangement of petals in a flower bud. Valvate, twisted, imbricate and vexillary are types of aestivation.
A: Valvate aestivation - In this sepals or petals or tepals just touch one another without any overlapping, e.g. Calotropis.
B: Twisted aestivation - Here, one margin of each petal overlaps the margin of an adjacent petal and the other margin being overlapped by margin of another adjacent petal, e.g. China rose, cotton.
C: Imbricate aestivation: If the margin of sepals or petals overlap one another but not in any particular direction as in Cassia and Gulmohur, the aestivation is called imbricate.
D: Vexillary aestivation - It is the characteristics aestivation of corolla of pea when posterior petal is outermost. E.g., bean.