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प्रश्न
Write a short note on Heterostyly.
उत्तर
Heterostyly: Some plants produce two or three different forms of flowers that are different in their length of stamens and style. Pollination will take place only between organs of the same length.
E.g: Primula.
संबंधित प्रश्न
Double fertilization is reported in plants of both, castor and groundnut. However, the mature seeds of groundnut are non-albuminous and castor are albuminous. Explain the post fertilization events that are responsible for it.
During double fertilization second male gamete fuses with ___________.
Name of the part of the ovary which gives rise to:
Seed ______
Explain the following term:
Elephophily
What are the advantages of the following in the flower to the plant concerned?
Smooth and light pollen
Given ahead is a diagrammatic sketch of the sectional view of a germinating pollen grain. Study the same and then answer the question that follows:
Name the parts labelled 1, 2, 3, 4 and 5.
Given ahead is a diagrammatic representation of the process of fertilization. Study the same and then answer the question that follows:
What happens to
i) Ovary
ii) Ovule after fertilisation
Given ahead is a diagrammatic representation of the process of fertilization. Study the same and then answer the question that follows:
What is the function of the synergids?
What is ‘double fertilization’? Describe it with the help of a neat and well-labeled diagram. Give its importance.
Describe the process of double fertilization in angiosperms and add a note on its significance.
In Haplopappus gracilis, number of chromosomes in cells of nucellus is 4. What will be the chromosome number in Primary endosperm cell?
Caruncle develops from
Define triple fusion.
‘Pollination in Gymnosperms is different from Angiosperms’ – Give reasons.
Give a concise account of the steps involved in the fertilization of an angiosperm plant.
The success of seed plants on land is mainly due to ______.
By which of the following the megasporangium proper of an angiosperm ovule is represented?
Identify the CORRECT statement with reference to cellular endosperm.
What would be the number of chromosomes in the megaspore mother cell of the plant if an endosperm of an angiosperm has 24 chromosomes?
Double fertilization is fusion of ______.
