Advertisements
Advertisements
प्रश्न
Why does the zygote begin to divide only after the division of Primary endosperm cell (PEC)?
Advertisements
उत्तर
The zygote needs nourishment during its development. As the mature, fertilised embryo sac offers very little nourishment to the zygote, the PEC divides and generates the endosperm tissue which nourishes the zygote. Hence, the zygote always divides after division of PEC.
APPEARS IN
संबंधित प्रश्न
Angiosperms bearing unisexual flowers are said to be either monoecious or dioecious. Explain with the help of one example each.
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.
Draw a labelled mature stage of a dicotyledonous embryo.
Why does endosperm development preceeds that of zygote ?
Why does endosperm development precede embryo development in angiosperm seeds?
Identify the ploidy of embryo and endosperm respectively formed after following cross.
An angiospermic male plant with 24 chromosomes in its pollen mother cells is crossed with female plant bearing 24 chromosomes in its root cells.
Identify the characteristic feature/s of helobial endosperm.
Which of the following triggers an acrosomal reaction of the sperm?
At what stage of endosperm development, will you observe nuclear or cellular type of endosperm?
In dicots, the pollen grains are usually ______
A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be ______.
The endosperm of gymnosperms is ______.
Double fertilization leading to initiation of endosperm in angiosperms require ______.
Indentify the wrong statement regarding post-fertilisation development.
If the endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in the root tip cells will be ______.
The cells of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes?
Mark the odd one.
