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प्रश्न
What is self-incompatibility?
उत्तर
Sexual incompatibility occurs when a pistil with functioning female gametes fails to establish seeds after pollination with viable and fertile pollen capable of fertilising another pistil. Sexual incompatibility can arise between members of different species or within the same species. This is also known as self-incompatibility.
APPEARS IN
संबंधित प्रश्न
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
Describe the characteristic features of wind pollinated flowers.
Why does self-pollination not lead to seed formation in self-incompatible species?
What is meant by emasculation?
Fill in the blanks:
The two kinds of pollination are __________ and __________.
Define the term Pollinating.
Give four adaptations shown by flowers pollinated by wind.
(iii) Synergids
(iv) Micropyle
Explain water pollination in detail with its types.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Pollination occurs in ______.
Chief pollinators of agricultural crops are ______.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Feathery stigma occurs in ______.
Insect pollinated flowers are ______.
The flower which does not open at all are called ______.
Match the Column I with Column II.
| Column I | Column II |
| A. Pea | (i) Xenogamy |
| B. Jawar | (ii) Epihydrophily |
| C. Maize | (iii) Anemophily |
| D. Vallis | (iv) Bisexual |
| E. Cannabis | (v) Geitonogamy |
Which of the following floral adapation are adapted by hydrophilous flowers?
Complete the following table:
| Sr. | Type of pollination | Agent | Kind of flower | Examples |
| (i) | ______ | Wind | ______ | Maize |
| (ii) | Chiropterophily | ______ | Dull colour, with strong fragrance, abundant nectar | Adansonia |
| (iii) | Entamophily | Insects | ______ | Rose/Jasmine |
| (iv) | Ornithophily | ______ | Brightly coloured, large and showy. They secrete profuse, dilute n ectar | ______ |
Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.
