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प्रश्न
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?
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उत्तर
(a) A represents the carpel. The carpel is composed of the stigma, style and ovary.
(b) The ovary contains gametes in the form of ovules.
(c) B represents the stamen. The swollen tip of the stamen is the anther.
(d) The anther has pollen grains.
(e) The stamen (B) is a male part and the carpel (A) is a female part.
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संबंधित प्रश्न
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
How is the process of pollination different from fertilization?
The fusion of male and female gametes is termed as ______.
Where are the pollen grains produced?
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
Fill in the following blank with suitable word :
The.......... at the base of the carpel contains egg cells.
Name the part of a seed which grows into root.
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel.
The part of a seed which grows and develops into root on germination is :
(a) cotyledon
(b) plumule
(c) follicle
(d) radicle
Bisexual : Hibiscus : : Unisexual : ___________
Pollen grains from anther are transferred to the stigma.
In which of the following manner the arrangement of megaspores in a tetrad is observed in angiosperms?
Which of the following is the outermost protective layer of anther?
Identify the female gametophyte in angiosperms.
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
The process of release of eggs from the ovary is called ______
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
Sexual maturation of reproductive tissues and organs are necessary link for reproduction. Elucidate.
Type of sexual reproduction is ______.
