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प्रश्न
Prepare a slogan for campaign against female foeticide.
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उत्तर
Avoid female foeticide, save girl child
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संबंधित प्रश्न
What is pollination?
(i) Name the part marked 'A' in the diagram.
(ii) How dose 'A' reachese part 'B'?
(iii) State the importance of the part 'C'.
(iv) What happens to the part marked 'D' after fertilisation is over?
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
State the function of flowers in the flowering plants.
A flower may have either male or female reproductive parts. Such a flower is called ______.
Where are the pollen grains produced?
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
How is the process of pollination different from fertilization?
Give some examples of different modes of fertilisation in nature?
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
Name the part of a seed which grows into root.
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
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.
One of the following occurs in the reproductive system of flowering plants as well as that of humans. This is :
(a) vas deferens
(b) anther
(c) ovary
(d) style
The correct sequence of reproductive stages occurring in flowering plants is ______
State whether the following statement is true (T) or false (F):
Stamens make egg cells.
Mention the function of Anther.
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
Draw a diagram of the longitudinal section of a flower exhibiting germination of pollen on stigma and label (i) ovary, (ii) male germ-cell, (iii) female germ-cell and (iv) ovule on it.
Sketch the labeled diagram:
Flower with its sexual reproductive organs
Explain sexual reproduction in plants.
Calyx : Sepals : : Corolla : ________________
Pollen grains from anther are transferred to the stigma.
Write the functions of sepals
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
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 ______
In a flowering plant, archesporium gives rise to ______.
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
Length of pollen tube depends on the distance between ______
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
Double fertilization is exhibited by ______
Sketch and label the essential and accessory whorls of flower.
Give any two examples of agents of pollination.
Type of sexual reproduction is ______.
Explain the post fertilization changes that occur in the ovary of a flower.
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
