Answer:
i dont know how to explain but i think its question 3 i might be wrong
Explanation:
Strains of bacteria can become immune to antibiotics that once killed them effectively <span>is the best example of evolution occurring.</span>
Answer:
Protons,neutrons
Explanation:
Inside atom,the entire mass of it lies in nucleus.
So,we knew that mass of atom= no of protons+ no of neutrons
hence from we understand,nucleus contain both protons and neutrons