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प्रश्न
Fill in the following blank with suitable word :
Pollen grains contain ............ gametes of a plant.
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उत्तर
Pollen grains contain male gametes of a plant.
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संबंधित प्रश्न
The fusion of male and female gametes is termed as ______.
Name the male part of the flower.
Explain the terms 'cross-pollination'?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
What changes take place in the flower after fertilisation which lead to the formation of seeds and fruit?
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 what ways is fertilisation in a plant different from fertilisation in a human?
Find the odd-one out, giving reason:
Anther, pollen grain, ovule male gamete
What part is played by stamens and carpels in reproduction?
Write the names of male and female reproductive parts of a flower.
Sketch the labeled diagram:
Flower with its sexual reproductive organs
Write the functions of sepals
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?
Generally, in a pollen tube, which of the following moves to the tip of the tube?
Variations occur as a result of ______
State the post-fertilisation changes that lead to fruit formation in plants.
