[Solved] In the life cycle of an angiosperm, which of the following stages is diploid? A) megaspore B) generative nucleus of a pollen grain C) polar nuclei of the embryo sac D) microsporocyte E) both megaspore and polar nuclei Genital Arousal: The physiological response of the genital organs to sexual stimulation, leading to increased blood flow and readiness for sexual activity. Plateau: A phase in which progress in physical or intellectual skills seems to halt temporarily after a period of rapid improvement. Premature Ejaculation: A sexual disorder in males characterized by ejaculation that occurs sooner than desired, either before or shortly after sexual penetration. Erotic Plasticity: The degree to which an individual's sex drive can be changed by societal, situational, and cultural influences.