Which organs are involved in elimination?

If you are talking about the human body, then you are referring to the Excretory Organ System. This system is involved in removing wastes that the body no longer needs. The kidneys are considered as the main excretory organs in humans because it helps the body eliminate excess water, urea, and other waste products in the form of urine. Other excretory organs include the skin, that releases sweat; the digestive system that removes insoluble materials through defecation; and the respiratory system that eliminates water vapor and carbon dioxide. 

Essential for a scientist to do for credibility

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

Anaphase for three hours then telophase for 2