Question

Explain the events after pollination leading to the formation of seed in angiosperm . Mention the polydy level of cell of different part of thebalbuminous seed.

Answer 1

Answer:

result of pollen-pistil interaction, germination of pollen tube takes’ place carrying two male gametes. One male gamete fuses with the egg cell (syngamy), while the other fuses with two polar nuclei to form primary endosperm nucleus (PEN). The zygote develops into an embryo while the PEN develops to form endosperm. After double fertilisation, the ovule matures into a seed while the ovary matures into a fruit.

Answer 2

Answer:

Each seed consists of a seed coat, an embryonal axis and cotyledons. Seeds may be albuminous (endosperm present as in the case of wheat and maize) or non-albuminous (endosperm absent, as it is consumed by the growing embryo as in the case of peas and beans).