Opening or blooming of the flower is known as
(a) anthesis
(b) maturation of embryo
(c) Pollination
(d) dehiscence of anther lobes

Options

A. anthesis
B. maturation of embryo
C. Pollination
D. dehiscence of anther lobes

Answer

To solve the question regarding the opening or blooming of a flower, we need to analyze each option provided:

1. **Understanding the Question**: The question asks for the term that describes the opening or blooming of a flower.

2. **Evaluating Option (a) Anthesis**:
- Anthesis is defined as the period during which a flower is fully open and functional. It involves the blooming of the flower bud, which is the main focus of the question.
- During anthesis, several processes occur, including the extension of the style, maturation of the stamens, and color changes in the flower.

3. **Evaluating Option (b) Maturation of Embryo**:
- This refers to the process of embryogenesis, where the embryo develops and matures. This does not relate to the blooming of a flower, so it is not the correct answer.

4. **Evaluating Option (c) Pollination**:
- Pollination is the transfer of pollen grains from the male reproductive structures to the female reproductive structures. While it is an important process in the life cycle of a plant, it does not describe the blooming of a flower.

5. **Evaluating Option (d) Dehiscence of Anther Lobes**:
- Dehiscence refers to the splitting open of the anther to release pollen grains. This is a process that occurs after the flower has bloomed, so it does not describe the blooming itself.

6. **Conclusion**: After evaluating all options, the correct answer is **(a) anthesis**, as it directly refers to the opening or blooming of a flower.

### Final Answer:
The opening or blooming of the flower is known as **(a) anthesis**.