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प्रश्न
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
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उत्तर
(b) pollen grains on upper surface of stigma and ovule.
Pollen grains land on the surface of the stigma. Hence, the pollen tube is formed so that the pollens can reach the ovules present in the ovary.
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संबंधित प्रश्न
What is pollination?
What is the function of a flower?
What is the name of female part of a flower?
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
How is the process of pollination different from fertilization?
Describe the process of fertilisation in a flower with the help of labelled diagrams.
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
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Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
Multiple choice question. Tick (✓) the correct choice:
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Pollen grain, male gamete, female gamete, ovary.
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What is meant by pollination?
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- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
Given below is a diagram of a germinating seed. Label the parts that:
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- stores food.
