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प्रश्न
Observe the figure below. Write functions of the labelled parts.
उत्तर
- Gynoecium (Carpel): It is an essential whorl. It is consists of stigma, style and ovary. It acts as a female reproductive part of the flower. It is responsible for the production of female gametes.
- Androecium (Stamen): It is an essential whorl. It is consists of anther and filament. It acts as a male reproductive part of the flower. It is responsible for the production of male gametes.
- Calyx and corolla: Calyx and corolla are accessory whorls. They are responsible for the protection of inner (essential) whorls.
- Pedicel: Pedicel is a small stalk which supports the flower.
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संबंधित प्रश्न
Name the parts labelled as A, B, C and D in the diagram given below:-
Answer the following question.
What is pollination? Explain the different types of pollination.
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
A student has to perform the experiment "To identify the different parts of an embryo of a dicot seed." Select from the following an appropriate group of seeds:
(a) Pea, gram, wheat
(b) Red kidney bean, maize, gram
(c) Maize, wheat, red kidney bean
(d) Red kidney bean, pea, gram
The fusion of male and female gametes is termed as ______.
State the name of the functional unit concerned with sexual reproduction.
Where are the pollen grains produced?
Where are a plant's sex organs located?
Where is the male gamete formed in flowering plants?
What is made in ovary of a flower?
How do the insects help in cross-pollination?
Explain the term 'fertilisation'.
Name the part of a seed which grows into shoot.
Which of the following is the correct sequence of events of sexual reproduction in a flower?
(a) pollination, fertilisation, seed, embryo
(b) seed, embryo, fertilisation, pollination
(c) pollination, fertilisation, embryo, seed
(d) embryo, seed, pollination, fertilisation
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)
Fill in the blank:
Seeds are formed from________.
Mention the function of Flower.
Mention the function of Anther.
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
What is phototropism?
What is pollination? Mention its types.
Draw a diagram of the longitudinal section of a flower and label the following parts.
Differentiate between self-pollination and cross-pollination.
Accessory whorls : Calyx and corolla : : essential whorls : ______________
Give scientific reason.
Fertilization in plants is called double fertilization.
The anther wall consists of four wall layers where ______
Identify the female gametophyte in angiosperms.
The flower of the Hibiscus plant is ______
Which out of the following processes does not lead to the formation of clones.
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
Which among the following statements are true for sexual reproduction in flowering plants?
- It requires two types of gametes
- Fertilisation is a compulsory event
- It always results in formation of zygote
- Offspring formed are clones
Give reason for the following:
Fertilization cannot take place in flowers if pollination does not occur.
Double fertilization is exhibited by ______
In a plant flower the female whorl is ______.
What is the function of calyx?
Name the reproductive parts of an angiosperm. Where are these parts located? Explain the structure of its male reproductive part.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
