Advertisements
Advertisements
प्रश्न
Describe the development of endosperm after double fertilisation in an angiosperm.
Advertisements
उत्तर
Development of Endosperm
- The primary endosperm nucleus repeatedly divides to give rise to free nuclei. This stage of development is called free nuclear endosperm.
- Cell wall formation occurs next, resulting in a cellular endosperm.
- The endosperm may either be fully consumed by the growing embryo (as in pea and beans) or retained in the mature seed (as in coconut and castor).
APPEARS IN
संबंधित प्रश्न
Angiosperms bearing unisexual flowers are said to be either monoecious or dioecious. Explain with the help of one example each.
Why does endosperm development preceeds that of zygote ?
______ is the first cell of female gametophytic generation in angiosperms.
In which of the following the primary endosperm nucleus undergoes free nuclear division or karyokinesis?
Ex-albuminous seeds differ from albuminous seeds in ____________.
The endosperm of gymnosperms is ______.
Indentify the wrong statement regarding post-fertilisation development.
The diagram given below shows the three types of endosperms in angiosperms.
 |
 |
 |
| Type 1 | Type 2 | Type 3 |
- Identify the three types of endosperms shown above.
- Name the type of endosperm which commonly occurs in polypetalous dicots.
The number of chromosomes in the leaf cells of a male plant is 40 and in the stem cells of a female plant is 60. If they are artificially hybridised, what will be the number of chromosomes in the endosperm?
In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are ______.
