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
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.
Describe the formation of helobial endosperm
Describe the development of an endosperm in a viable seed. Why does endosperm development precedes embryo development?
Why does endosperm development precede embryo development in angiosperm seeds?
______ 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?
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.
Which of the following triggers an acrosomal reaction of the sperm?
In dicots, the pollen grains are usually ______
If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be ______.
The endosperm of gymnosperms is ______.
Indentify the wrong statement regarding post-fertilisation development.
The type of evolution where the central part is occupied by free nuclear and the peripheral part by cells is observed in ______.
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?
What is the ploidy level and functional role of endosperm formed after fertilisation in flowering plants?
Which of the following plants develops cellular type endosperm?
