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 one of the processes of evolution. Natural selection is one of the mechanisms of evolution. Natural selection is the process in which individuals whom are better suited to their environment will have an increase fitness. For natural selection to occur, the following must be true: There must be variation in traits (every individual can't be identical)