Question

The term antithesis is used for
A) Cluster of anthers
B) Opening of flowers
C) Dehiscence of anthers
D) Falling of flowers

Answer 1

Hint: The predominant purpose of a flower is reproduction. In flowers, the androecium of stamens and gynoecium of carpels are known as essential whorls. It represents a complete, typical flower because they are directly associated with the reproduction.
Pollination is a part of the sexual reproduction process in flowering plants and it plays a major role in the life cycle of a flowering plant.

Complete answer:
The term ‘Antithesis’ refers to the flowering period in which the flower bud remains fully open and becomes functional. It includes the extension of style beyond upper perianth, maturation of stamen and different changes in colour along with the inflorescence.
Generally, the opening (blooming) of a floral bud in the form of flower is called anthesis of a flower. It is also considered as the onset of that period.

Therefore, the correct answer is option B: ‘Opening of flowers’

Additional Information: In some species, the onset of the flowering period is very spectacular and impressive. E.g., Banksia
Flowers with diurnal anthesis look very bright in colour in order to attract diurnal insects like butterflies. Flowers with nocturnal anthesis are mostly white or less colorful and they usually attract nocturnal insects like moth species.

Note: BAGGING TECHNIQUE: It is the removal of stamens in bud condition i.e. before anthesis from bisexual flower and then it is covered with a plastic bag or a butter paper to prevent its stigma from undesired / unwanted pollen grains. To control the self-pollination in bisexual flowers by emasculation, plant breeders often use this conventional plant breeding programme called Bagging Technique.