A species <span>a group of organisms that have similar traits and are able to produce fertile offspring.
Hope this helps! -Chat</span>
Answer:
the picture isnt popping up
Radioactive decay occurs when an atom has either to many or to few neutrons and becomes unstable and start to emit radio active radioactive radiation and the atom start to decompose.
At the end two things can happen either the atom will transform in a new element with a lower atomic # and atomic mass # or the remaining neutron will transform into an electron and be on its own way
Other reasons are
Not finishing the antibiotics.
Or
Taking antibiotics too often
