Advertisements
Advertisements
प्रश्न
How does pollination occur?
Advertisements
उत्तर
Pollination occurs when pollen grains are transferred from the anther to the stigma of a flower. This transfer may be carried out by agents such as wind, water, insects, birds, or other animals, and may occur through self-pollination or cross-pollination.
APPEARS IN
संबंधित प्रश्न
In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I, II and III sequentially?
Name the parts labelled as A, B, C and D in the diagram given below:
Sketch the reproductive parts of a flower.
How does the process of fertilisation take place in flowers?
Name the part made up of the stigma, style and ovary.
What is the name of female part of a flower?
What is made in anther of a flower?
What is made in ovary of a flower?
Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel.
| When an insect sits on the flower of a plant then somene 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. |
- 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?
- What is the name of tube B?
- What is C which moves down through the tube B?
- Name D and E.
- What is F?
Put a tick mark (✓) against the correct alternative in the following statement
Pollen is produced in the:
Fill in the blank by selecting suitable word:
A flower bearing only male or female parts is known as __________ flower.
List any two differences between pollination and fertilization.
Identify the parts A, B, C, and D?
Write the events involved in the sexual reproduction of a flowering plant.
Discuss the first event and write the types.
Antipodal cells are present towards the ______ in an anatropous ovule.
Flowers showing ornithophily show few characteristic like ______.
In a flowering plant, archesporium gives rise to ______.
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
Double fertilization is essential for formation of ______.
