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प्रश्न
Answer the following question.
How does suitable pollination lead to fertilization?
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उत्तर
As the pollen of the right type is deposited on to the stigma of the flower of the same species, quite often it leads to germination of pollen grain as a result of a chemical cross-talk between the pollen and the carpel. Germination leads to the growth and extension of the pollen tube through the style of the flower to its ovary. The pollen tube carries the male gametes all the way to the ovule inside the ovary, leading to fertilization of male gamete with the female gamete inside the ovule.
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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 |
Name the parts labelled as A, B, C and D in the diagram given below:-
What is the function of a flower?
Fill in the following blank with suitable word :
The female organ of reproduction in the flower is the...........
What is pollination? How does pollination occur?
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
What is phototropism?
How many middle layers are generally present in the wall of the anther lobes?
Variations occur as a result of ______
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
