Question

Match the column-I with column-II with respect to aestivation:

• A. a-(ii), b-(i), c-(iv), d-(iii)
• B. a-(iii), b-(ii), c-(iv), d-(i)
• C. a-(iv), b-(ii), c-(iii), d-(i)
• D. a-(i), b-(iii), c-(iv), d-(ii)

Answer 1

The correct option is D a-(i), b-(iii), c-(iv), d-(ii)

The main types of aestivation are valvate, twisted, imbricate
and vexillary.

When sepals or petals in a whorl just touch one another at the margin, without overlapping, it is said to be valvate.

If one margin of the appendage overlaps that of the next one and so on, it is called twisted.

If the margins of sepals or petals overlap one another but not in any particular direction, the aestivation is called imbricate.

If there are five petals and the largest (standard) overlaps the two lateral petals (wings) which in turn overlap the two smallest anterior petals (keel), this type of aestivation is known as vexillary.