What toxic substance build up in animals, How do animals address this problem? Give examples :)

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What organelle other than the nucleus houses dna in a eukaryotic cell?

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

Why are common names a problem for scientist?