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प्रश्न
With the help of a suitable example, explain protandry.
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उत्तर
In this type, androecium matures earlier than the gynoecium, e.g., in the disc florets of sunflowers.
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संबंधित प्रश्न
Why does self-pollination not lead to seed formation in self-incompatible species?
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Give one word/term for the following:
Pollination of flowers by insects.
Give one word/term for the following:
Pollination of flowers by birds.
Differentiate Between Cross Pollination and Self Pollination:
Choose the correct statement from the following.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
Consider the following statements depicting adaptation of flowers to carryout successful pollination.
- Stigma is long, sticky and unwettable.
- Sepals, petals or perianth (if present) have waxy coating.
- Stamens with long filament and versatile anthers.
- Tubular corolla is seen.
- Flowers are noctumal.
Which of the above statements clearly depict hydrophily?
