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.
Explain how environmental factors can act as forces of natural selection? Explain why editing is better than creating as a metaphor for how natural selection acts on a population? Explain why natural selection does not act directly on genes? More questions Can you explain why natural selection acts on the phenotype rather than on the genotype of an organism?