Question

Primary endosperm nucleus is formed by fusion of

• A. Two polar nuclei and two male gametes
• B. Two polar nuclei and one male gamete
• C. Ovum and male gamete
• D. One polar nucleus and male gamete

Answer 1

The Correct Option is B

• The primary endosperm nucleus is formed during the process of double fertilization in angiosperms. It results from the fusion of two polar nuclei and one male gamete (sperm cell).
• This fusion creates the primary endosperm nucleus, which later develops into the endosperm tissue, providing nourishment to the developing embryo.

The correct answer is (B) : Two polar nuclei and one male gamete.

Answer 2

The correct answer is: (B) Two polar nuclei and one male gamete.

The primary endosperm nucleus is formed during fertilization in plants. It is the result of the fusion of two polar nuclei from the central cell of the ovule and one male gamete (sperm cell) from the pollen. This process is known as double fertilization.

The fusion of the two polar nuclei and the male gamete forms the primary endosperm nucleus, which gives rise to the endosperm. The endosperm serves as a nutritive tissue that provides nourishment to the developing embryo within the seed.

Thus, the primary endosperm nucleus is formed by the fusion of two polar nuclei and one male gamete.