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प्रश्न
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
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उत्तर
|
Unisexual Flower |
Bisexual Flower |
|
The flower has either stamen or pistil only are called unisexual flowers. |
The flower has both stamen and pistil are called bisexual flowers. |
|
Example: Papaya |
Example: Hibiscus |
Diagram showing germination of pollen grain on stigma:
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संबंधित प्रश्न
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
"The chromosomal number of the sexually producing parents and their offspring is the same." Justify this statement.
How is the process of pollination different from fertilization?
What is the name of female part of a flower?
What is made in ovary of a flower?
Describe the process of fertilisation in a flower with the help of labelled diagrams.
Which of the following statements are true for flowers?
(i) Flowers are always bisexual.
(ii) They contain sexual reproductive organs.
(iii) They are produced in all groups of plants.
(iv) after fertilization they give rise to fruits.
Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:
Pollen grain, male gamete, female gamete, ovary.
Bisexual : Hibiscus : : Unisexual : ___________
Distinguish between self-pollination and cross-pollination.
