[Solved] Which stage would show the development of the ectoderm and endoderm germ layers? A)early gastrulation B)neurulation C)blastulation D)late gastrulation Sexual Orientation: An enduring pattern of emotional, romantic, or sexual attractions to men, women, or both sexes. Erotic Plasticity: The degree to which one's sex drive or erotic preferences may be shaped by environmental, social, or situational factors. Refractory Period: A time period following an action or physiological event during which a second action or event cannot be initiated. Erotic Plasticity: The degree to which an individual's sex drive can be changed by societal or environmental factors.