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प्रश्न
What is the structural unit of sexual reproduction in plant?
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उत्तर
Flower is the structural unit of the sexual reproduction in plant.
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संबंधित प्रश्न
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
(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?
Name the part made up of the stigma, style and ovary.
What is the name of female part of a flower?
Where is the female gamete formed in flowering plants?
Fill in the following blank with suitable word :
The male organ of reproduction in the flower is the.......... .
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
Draw a neat sketch of the stamen of a flower. Mark in it filament and anther.
Draw a neat sketch of the carpel of a flower. Mark in it stigma, style and ovary.
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?
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
When an insect sits on the flower of a plant then some particles A present in the top of little stalks in the flower attach to its body hair. When this insect now sits on the flower of another similar plant, then particles A attached to the hair of insect are put on the top of a flask-shaped organ at the centre of flower. The particle A grows a long tube b from the top of flask-shaped organ through which C moves down and reaches the bottom part of flask-shaped organ. Here C fuses with the nucleus of d contained in structure E. the fusion of C and D forms a new cell f which grows and develops into a seed of the plant.
(a) What are particles A? What is the process of transferring A from one flower to another flower of similar plant by the insect known as?
(b) What is the name of tube B?
(c) What is C which moves down through the tube B?
(d) Name D and E.
(e) What is F?
In a bisexual flower, inspite of the young stamens being removed artificially, the flower produces fruit. Explain.
Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
What part is played by stamens and carpels in reproduction?
What is phototropism?
List any two differences between pollination and fertilization.
Fill in the blanks and rewrite the completed statements:
Lymph flows in _______________ direction.
A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
Bisexual : Hibiscus : : Unisexual : ___________
Write the functions of sepals
Distinguish between self-pollination and cross-pollination.
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
The essential parts of a flower are ______.
Identify the parts A, B, C, and D?
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
Gloriosa superba exhibits ______.
The seed that contains the future plant is called the ______
Variations occur as a result of ______
Where is the zygote located in the flower after fertilization?
Trace the path a male gamete takes to fertilise a female gamete after being released from the penis.
Double fertilization is exhibited by ______
Double fertilization means ______.
In a plant flower the female whorl is ______.
