Advertisements
Advertisements
प्रश्न
Write the function of LS of Anotropous ovule.
उत्तर
- Funiculus: ovary and is attached to the placenta by a small stalk called funiculus.
- Hilum: The place of attachment of funiculus with the main body of ovule, is called hilum.
- Integuments: Which is surrounded usually by two protective coverings called integuments viz. Outer and an inner integument.
- Microphyle: Narrow opening at the apex of the ovule is called micropyle.
- Nucellus: Provides nutrition to the developing embryo.
- Embryo sac: Embryo sac (female gametophyte) is oval, multicellular structure embedded in the nucellus.
APPEARS IN
संबंधित प्रश्न
Define 'microsporogenesis'.
The outer layer of the pollen grain is thick and made up of a complex, non-biodegradable substance called _______.
In the following case mention the correct ratio of pollen mother cells, generative cells, vegetative cells, and male gametes produced by the microsporangium.
A total of 168 pollen grains with 14 chromosomes in each pollen grain are released from a mature microsporangium.
Which of the following chemically inert compound is observed in the exine of pollen grain?
How many meiotic divisions are required to produce 576 haploid microspores if there are 24 microspore mother cells?
How many microspore mother cells will be there in each pollen chamber if there are 1280 microspores in a tetralocular anther?
Draw a labelled diagram of the LS. of Anatropous ovule.
Complete the following flow chart:
Name the organic materials that constitute the exine and intine of the angiospermic pollen grain Write the significance of exine.
Synergids are______.
