With reference to the reproductive parts of flower, consider the foll...
- Stamen is the male reproductive part and it produces pollen grains that are yellowish in colour.
- Carpel is present in the centre of a flower and is the female reproductive part. It is made up of three parts.
- The swollen bottom part is the ovary, the middle elongated part is the style and the terminal part which may be sticky is the stigma. The ovary contains ovules and each ovule has an egg cell.
- The pollen needs to be transferred from the stamen to the stigma. If this transfer of pollen occurs in the same flower, it is referred to as self-pollination. On the other hand, if the pollen is transferred from one flower to another, it is known as cross pollination. This transfer of pollen from one flower to another is achieved by agents like wind, water or animals.
With reference to the reproductive parts of flower, consider the foll...
The correct answer is option 'D' - 1 and 2 Only.
Explanation:
1. Stamen produces pollen grains:
The stamen is the male reproductive part of a flower. It consists of two main parts - the anther and the filament. The anther is responsible for producing pollen grains, which contain the male gametes (sperm cells). These pollen grains are released from the anther and are usually transferred to the female reproductive part of another flower for fertilization.
2. The swollen part of the carpel is known as the ovary:
The carpel is the female reproductive part of a flower. It consists of three main parts - the stigma, style, and ovary. The ovary is the swollen part of the carpel that contains one or more ovules. The ovules are responsible for producing the female gametes (egg cells). After fertilization, the ovary develops into a fruit, which protects the developing seeds.
3. Cross-pollination involves the transfer of pollen grains to a different flower:
Cross-pollination is the transfer of pollen grains from the anther of one flower to the stigma of another flower. This can occur through various agents such as wind, water, insects, or animals. It brings about genetic diversity in plants and is essential for plant breeding and evolution. In cross-pollination, the pollen grains are transferred to a different flower, not the same flower.
Therefore, the correct statements are:
1. Stamen produces pollen grains.
2. The swollen part of the carpel is known as the ovary.
Hence, the correct answer is option 'D' - 1 and 2 Only.