an endosperm

After fertilization, the zygote undergoes a number of mitotic divisions and form a multicellular embryo. The primary endosperm nucleus also passes through a series of mitotic divisions and form a mass of endosperm cells which provide nourishment to the developing embryo. Based o..

In this type of endosperm, the PEN undergoes repeated division and produces numerous free nuclei. The nuclear division is not followed by wall formatio..

This is an intermediate type of endosperm formation between the nuclear and cellular types. In this, the first division is accompanied by wall formation but the subsequent divisions are nuclea..

In this type, the first mitotic division is followed by cytokinesis resulting in the formation of two unequal cells. Subsequent divisions are of the free nuclear type making the endosperm cellular after cytokinesis or at maturit..

On reaching the stigma, the pollen grains put out a tube. This is called germination of the pollen grain. Fertilisation in a Flowering Plant The tip of the tube contains the male nuclei. The tube grows and enters the ovule where it bursts at the tip releasing the male gametes. One of the male ..

The flowers are with only one non-essential whorl (perianth) or absence of non-essential whorls. It includes 8 series. Curvembryae: Usually single ovule, embryo coiled around the endosperm. Multiovulate Aquaticae: Aquatic plants with syncarpous ovary and many ovules. Multiovulate Terr..

In Cucurbita, pollen tube enters the ovule through the integuments. After the pollen tube enters the embryosac, its apex dissolves and the male gametes are liberated. One of the male gametes fuses with the egg and produces a diploid zygote (Strassburger, 1884) which by further division develops i..

. The lowest cell of the suspensor divides to give rise to the radicle. The primary endosperm nucleus (PEN) starts dividing even before the zygote nucleus divides. There are three types of endosperm formati..

. The lowest cell of the suspensor divides to give rise to the radicle. The primary endosperm nucleus (PEN) starts dividing even before the zygote nucleus divides. There are three types of endosperm formati..

Question: What is double fertilization? Answer: On reaching the stigma, the pollen grains put out a tube. The pollen tube grows and enters the ovule where it bursts at the tip releasing the male gametes. One of the male gamete fuses with the egg, the female gamete. The fusion of the male..