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प्रश्न
Why does the zygote begin to divide only after the division of Primary endosperm cell (PEC)?
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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.
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संबंधित प्रश्न
Angiosperms bearing unisexual flowers are said to be either monoecious or dioecious. Explain with the help of one example each.
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Describe the development of endosperm after double fertilisation in an angiosperm.
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(A) haploid
(B) diploid
(C) triploid
(D) tetraploid
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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?
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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.
Mark the odd one.
The coconut water from tender coconut is ______
The type of evolution where the central part is occupied by free nuclear and the peripheral part by cells is observed in ______.
