<span>If a test tube has been used, and its contents is supposed to be disposed, carefully pour the contents to the lavatory with a confirmation of a professional (as it may damage the pipelines of the sink) and ensure that there are no splashes created that can contact the human skin. Wash the test tube thoroughly and let dry.</span>
D: Neutral mutation. It says the eyesight remains normal. Therefore it cannot be harmful. Changing eye color has no effect on the ability to find food. Eye color is just an appearance.
Answer:
The central part of the atom, composed of protons and neutrons.
am not totally sure but I think the answer is D
