Mutations in certain genes of bacteria cause them to be resistant to powerful antibiotics. what type of mutation is this for the bacteria?
1.beneficial
2.harmful
3.neutral
4.both beneficial and harmful

4.both beneficial and harmful

Explanation:

Mutations that occur in bacteria that make them immune to antibiotic action can be a beneficial or harmful mutation, it depends on whether you are referring to the bacteria or to humans.

The mutation is beneficial to the bacterium because with the mutation it becomes immune to the antibiotic reaction, achieves resistance and becomes an "unbeatable" bacterium, so the mutation has a huge benefit for the bacterium because it allows it to survive and continue its life. metabolism normally.  

On the other hand, this mutation is extremely harmful to humans, because the antibiotic is what we have to fight bacteria and get rid of infections that can cause us many problems. For this reason, the mutation that makes bacteria resistant to antibiotics is highly harmful to humans.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the answer to this question is 3.