Question

Anthesis is
A) Opening of floral bud
B) Development of anthers
C) Maturation of anthers
D) Reception of pollen by stigma

Answer 1

Anthesis is a process which is related to the flowering plants. Flowering plants are called as the angiosperms. They are the vascular plants having proper vascular or conduction systems which include Xylem and Phloem. Xylem is responsible for the conduction of water and minerals from the roots to the other parts of the plant and phloem is responsible for the conduction of organic material of food from the site of production to the other parts of the plant.

Complete answer:
Anthesis:

Anthesis is the flowering period of a plant.
The flowering appears to be a response to a combination of different factors.
These factors may include day length, temperature, and rainfall.
Flowering may also be initiated by the addition of gibberellins (hormone responsible for promoting growth).
It is a period which refers to the opening of floral buds and the flower becomes functional during this time.
It is the time when a flower becomes sexually active.
Flowers with diurnal anthesis (anthesis in day time) are brightly coloured so as they can attract diurnal insects such as butterflies.
Flowers with nocturnal anthesis (anthesis in night time) generally white or less colourful so they can make contrast with the dark colour of night and can attract the nocturnal insects such as many moth species.
Therefore , it has been clear from the above discussion that anthesis is the opening of the floral bud.

Hence, option A is the correct answer.

Note: Flower is the reproductive part of the angiosperms. A flower is also called as the bloom or blossom .The function of the flower is to facilitate reproduction. A flower consists of sepals (calyx), petals (corolla), gynoecium (female reproductive part) and Androecium (male reproductive part).