The process used to describe the process by which two separate species may evolve in a similar way is called Natural Evolution
Epithelial, connective, muscular and nervous
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When a disease is acute, it will be a short duration. It may be severe and impair normal functioning. They also come on rapidly, and are accompanied by distinct symptoms that require urgent or short-term care, and get better once they are treated.
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photosynthetic organisms contain light absorbing molecules called pigments. These pigments absorb wavelengths of visible light while reflecting others.