Advertisements
Advertisements
प्रश्न
Explain sexual reproduction in plants.
उत्तर
- In sexually reproducing plants, flowers function as the reproductive organs.
- In flowers, male organ is the stamen and female organ is the carpel.
- Flowers which have both the male and female organs i.e. stamens and carpels are called bisexual flowers whereas flowers which have either male or female organs are called unisexual.
- Male gametes called pollen grains are produced by stamen, and carpels produce female gametes called ovules or egg cells inside ovaries.
- Fertilization takes place in the ovule where the egg cell and pollen grain fuse.
- This fertilized egg cell later develops into an embryo and the entire ovule gets converted into a seed.
- Under favourable conditions, the seed germinates to give rise to a new plant.
APPEARS IN
संबंधित प्रश्न
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
Mention the changes a flower undergoes after fertilisation.
How does the process of fertilisation take place in flowers?
What is the name of female organ of a flower (other than carpel)?
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
How is the process of pollination different from fertilization?
What type of plants reproduce by sexual reproduction method?
Name the part of a seed which contains stored food.
Name the part of a seed which grows into root.
Name the part of a seed which grows into shoot.
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
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.
In the figure given alongside, the parts marked A, B and C are sequentially :
(a) cotyledon, plumule and radicle
(b) plumule, radicle and cotyledon
(c) plumule, cotyledon and radicle
(d) radicle, cotyledon and plumule
The correct sequence of reproductive stages occurring in flowering plants is ______
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
Mention the function of Anther.
In the figure, the parts marked A, B and C are sequentially:
(A) Plumule, Radicle and Cotyledon
(B) Radicle, Plumule and Cotyledon
(C) Plumule, Cotyledon and Radicle
(D) Radicle, Cotyledon and Plumule
Write the names of male and female reproductive parts of a flower.
Describe an activity to demonstrate phototropism.
Answer the following question.
List two agents of pollination?
Pollen tube reaches the embryo sac via style.
What does germination mean?
Give scientific reason.
Flower is a structural unit of sexual reproduction in plants.
Explain the sexual reproduction process in plants with a diagram.
Identify the parts A, B, C, and D?
Where does the endothecium layer of anther lobes is present?
The anther wall consists of four wall layers where ______
Which of the following is the outermost protective layer of anther?
Pineapple fruit develops from ______.
The flower of the Hibiscus plant is ______
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
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
What is puberty?
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.
