A stroke can result in a number of visual problems, including visual neglect, decreased visual acuity, diplopia (double-vision), squint, and homonymous hemianopsia (visual field defects).
Natural Selection. Natural selection is the process by which individuals with characteristics that are advantageous for reproduction in a specific environment leave more offspring in the next generation, thereby increasing the proportion of their genes in the population gene pool over time.
Natural selection is the nonrandom survival and reproductive success of randomly varying organisms. Evolution is the change in allele frequency over time in a population of organisms. So, the individual naturally selected will leave more decedents in the population and his descendents will have thâ¦.