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प्रश्न
Describe the formation of helobial endosperm
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उत्तर
Helobial type of endosperm:
a. It is an intermediate between nuclear and cellular type of endosperm.
b. First division of primary endosperm nucleus is followed by (division of cytoplasm) wall formation.
c. The wall formation results in the central cell being divided into a large micropylar and a small chalazal chamber.
d. In both the chambers the development occurs as seen in nuclear type.
e. This type is generally seen in Helobiae series of monocots, hence the name ‘Helobial Endosperm’.
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संबंधित प्रश्न
A non biology person is quite shocked to know that apple is a false fruit, mango is a true fruit and banana is a seedless fruit. As a biology student how would you satisfy this person?
Describe the development of endosperm after double fertilisation in an angiosperm.
Why does endosperm development preceeds that of zygote ?
______ is the first cell of female gametophytic generation in angiosperms.
Identify the CORRECT statement/s from the following.
i. In post-fertilization changes within the ovule, the development of embryo is followed by the development of endosperm.
ii. Helobial endosperm is intermediate between cellular and nuclear type endosperm.
iii. Helobial endosperm is mostly observed in 72 families of dicots.
Ex-albuminous seeds differ from albuminous seeds in ____________.
A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be ______.
If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be ______.
Why does the zygote begin to divide only after the division of Primary endosperm cell (PEC)?
In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are ______.
