Well scientist have made the microscope and telescope and we have discover new bacteria and new plant(s) which has help a lot <span />
Answer:
B. refraction
Explanation: hope this helps!
Answer:
D. Particle A orbits the nucleus, and Particle B is located in the nucleus
Explanation:
Here since both particles are of the same atom and particle A is much lighter we can infer that Particle A is electron because electrons are much lighter than protons which are Particle B in this case. Thus, particle A orbits nucleus as an electron does and particle B is in nucleus where protons are.
A hypersensitive reaction to a specific antigen in the environment is a(n) _ALLERGY_.
