There always has to be a dominant allele
The virus that infect bacteria are called bacteriophage ! Hope this helps! :)
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don't know this one sorry
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Nucleus
the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
Nucleolus
a small dense spherical structure in the nucleus of a cell during interphase.
When 2 species bennift like fish cleaning a whale by eating off his skin