Biology
Which one of the following is one of the characteristics of self-pollinated flowers?
- Flowers are large and showy
- Flowers remain closed and do not open
- Stigma and anthers mature at the same time
- Pollen is produced in very large quantities
Answer
Stigma and anthers mature at the same time
Reason — Homogamy i.e., maturation of stigma and anthers at the same time is necessary for self-pollination.
Large and showy flowers are generally a feature of cross-pollinated plants. Flowers that remain closed and do not open show cleistogamy, which is a special condition favouring self-pollination but not a general characteristic of all self-pollinated flowers. Pollen produced in very large quantities is a feature of many cross-pollinated plants, especially wind-pollinated plants.
Related Questions
Mention if the following statements are true
- Intine is the outer wall of pollen grain.
- Pollen tube enters ovule through micropyle.
- Zygote gives rise to embryo.
- Ovule becomes fruit.
- Dry sepals may persist in some fruits.
Exine and intine are the parts of:
- Embryo sac
- Pollen grain
- Stigma
- Seed
The kind of pollination in which the pollen of the same flower fall on its stigma is termed as:
- Geitonogamy
- Autogamy
- Homogamy
- Allogamy
Which of the following conditions favours self-pollination?
- Homogamy
- Herkogamy
- Dichogamy
- None of these