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Generally, plants choose between either the asexual reproduction or sexual reproduction pathways. Sexual reproduction in animals requires fusing male cells (contained in pollen) and female cells (contained in ovule).

The fertilization can be self (the fusion of flowers from the same plant) or cross-fertilization, which occurs between the flowers from different parts.

Pollination allows the pollen tube to reach the female reproductive part, stigma. As the flowers do not themselves pollinate during fertilization, the statement is not entirely true.

Thus, the flowers do not get pollinated twice.

Therefore, the given statement is false.

The fertilization in plants proceeds with the physical fusion of the male and female gametes. The egg does not need two sperms to produce an embryo as one male gamete is enough to fertilize with the egg cells and form a zygote.

Thus, two male gametes do not fertilize a single egg cell.

Therefore, the given statement is false.

Along with egg cells, there are two polar nuclei in the ovule. The process of double fertilization occurs when the second sperm cell fuses with polar nuclei.

Thus, one sperm fuses with egg cells while the other fuses with polar nuclei.

Therefore, the given statement is true.

The sperm cells are essentially haploid and contain single nuclei. Double fertilization does not mean that sperm cells have two nuclei. Instead, it refers to the double fertilization event of two sperm cells with an egg cell and polar nuclei.

Thus, sperm cells do not have two nuclei.

Therefore, the given statement is false.