Question

Anthesis is a phenomenon which refers to

• A. formation of pollen
• B. reception of pollen by stigma
• C. opening of flower bud
• D. development of anther

Answer 1

The correct option is C

opening of flower bud

The correct option is C.

Explanation of correct option:

1. Anthesis refers to the period of opening of the flower bud. In this way, the flower becomes functional.
2. In anthesis, the style is extended far beyond the upper perianth of a flower.
3. It facilitates the pollination process.
4. Diurnal anthesis is observed in bright-coloured flowers which attract insects. Nocturnal anthesis is found in white or pale-coloured flowers that attract several moth species.

Explanation of incorrect option:

Option A:

1. The formation of pollen is known as microgametogenesis.
2. Pollen grains are formed from microspores.

Option B:

1. Reception of pollen by stigma is termed pollination.
2. There are three types of pollination- autogamy, geitonogamy, and xenogamy.

Option D:

1. The anther is a part of the flower which plays an important role in pollen formation.
2. The anther contains microsporangia which are developed from a group of cells called eusporangiate.

Final answer: Anthesis is a phenomenon which refers to the opening of the flower bud.