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प्रश्न
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
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उत्तर
After fertilisation, the eggs in the ovule grow and develop into seeds. The ovule develops a thick coating and forms the seed, whereas the ovary develops into a fruit that contains the seed.
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संबंधित प्रश्न
Sketch the reproductive parts of a flower.
Name the part made up of the stigma, style and ovary.
Explain the terms 'self pollination'
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
Which among the following statements are true for unisexual flowers?
(i) They possess both stamen and pistil
(ii) They possess either stamen or pistil
(iii) They exhibit cross pollination
(iv) Unisexual flower possessing only stamens cannot produce fruits
(a) (i) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (i), (iii) and (iv)
Which of the following statements are true for sexual reproduction in flowering plants?
(i) it requires two types of gametes
(ii) fertilisation is a compulsory event
(iii) it always results in the formation of zygote
(iv) offsprings formed are clones
(a) (i) and (iv)
(b) (i), (ii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii), (iii) and (iv)
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
Draw a diagram of a pistil showing pollen tube growth into the ovule and label the following:
Pollen grain, male gamete, female gamete, ovary.
List any two differences between pollination and fertilization.
Fill in the blank by selecting suitable word:
Transfer of pollen grains from the anther to the stigma is known as______________.
Draw a diagram of the longitudinal section of a flower and label the following parts.
Accessory whorls : Calyx and corolla : : essential whorls : ______________
What does germination mean?
Identify the parts A, B, C, and D?
Flowers showing ornithophily show few characteristic like ______.
Conidia are formed endogenously while zoospores are formed endogenously.
The flower of the Hibiscus plant is ______
Pollen grains are produced by ______
In flowering plants, the pollen grains are transferred to stigma by pollination but the female germ cells are present in the ovary.
Explain with the help of a labelled diagram (only concerned parts), how the male germ cell reaches the ovary.
Given below is a diagram of a germinating seed. Label the parts that:
- gives rise to future shoot.
- gives rise to future root system.
- stores food.
