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प्रश्न
Define.
Inflorescence
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उत्तर
A specialised axis or branch over which flowers are produced or borne in definite manner is known as inflorescence.
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संबंधित प्रश्न
Match the following:
| Column A | Column B |
| (i) Stigma | (a) Neuron |
| (ii) Pepsin | (b) Carpel |
| (iii) Dendrites | (c) Protein |
| (d) Stamen |
What is pollination?
Name and differentiate between the two modes of pollination in flowering plants.
Name the parts labelled as A, B, C and D in the diagram given below:
Name the male part of the flower.
Where are a plant's sex organs located?
Fill in the following blank with suitable word :
Flowering plants reproduce by ...........method of reproduction.
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
What is made in anther of a flower?
Give some examples of different modes of fertilisation in nature?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
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
The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollen tops which lie just inside the ring of petals.
(a) Name A. What are the various parts of A?
(b) Which part of A contains gametes?
(c) Name B. What is the swollen top of B known as?
(d) What does the swollen top of b contain?
(e) Out of A and B, which one is (i) male part, and (ii) female part of the flower?
State whether the following statement is true (T) or false (F):
Flowers which possess stamens and carpel are called unisexual.
What part is played by stamens and carpels in reproduction?
Explain the process of fertilisation in flowers.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
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
List any two differences between pollination and fertilization.
Sketch the labelled diagram.
Flower with its sexual reproductive organs.
Prepare a slogan for campaign against female foeticide.
Mention pollination types.
Accessory whorls : Calyx and corolla : : essential whorls : ______________
What does germination mean?
Explain the sexual reproduction process in plants with a diagram.
Observe the figure below. Write functions of the labelled parts.
The essential parts of a flower are ______.
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
Antipodal cells are present towards the ______ in an anatropous ovule.
Which of the following is the outermost protective layer of anther?
Generally, in a pollen tube, which of the following moves to the tip of the tube?
The seed that contains the future plant is called the ______
Length of pollen tube depends on the distance between ______
The ovaries of different flowers may contain ______.
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
Double fertilization is essential for formation of ______.
Sketch and label the essential and accessory whorls of flower.
Consider the following three flowers namely X, Y and Z. Which flower(s) would develop into a fruit?
| Flower X | Flower Y | Flower Z |
 |
 |
 |
- Assertion: Primary endosperm nucleus is diploid.
- Reason: It is the product of double fertilisation.
