Advertisements
Advertisements
प्रश्न
What are the advantages of the following in the flower to the plant concerned?
Smooth and light pollen
उत्तर
Easily carried by wind to enable cross-pollination
APPEARS IN
संबंधित प्रश्न
Why do you think the zygote is dormant for sometime in a fertilised ovule?
Triple Fusion involves:
(i) Fusion of one male, gamete with female gamete
(ii) Fusion of tube nucleus with generative nvcleus
(iii) Fusion of two polar nuclei.
(iv) Fusion of second male gamete with two polar nuclei
Explain the events up to double fertilisation after the pollen tube enters one of the synergids in an ovule of an angiosperm.
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:
What happens to the part labelled '5' during the process?
Explain double fertilization and its significance.
Pollen tube was discovered by
Match the following
| I) | External fertilization | i) | pollen grain |
| II) | Androecium | ii) | anther wall |
|
III) |
Male gametophyte | iii) | algae |
| IV) | Primary parietal layer | iv) | stamens |
Which of the following happens during triple fusion?
All the events from pollen deposition on the stigma until pollen tubes enter the ovules are together referred to as ______.
In the figure given below label the following parts: male gametes, egg cell, polar nuclei, synergid and pollen tube
