Pericope: an apparatus consisting of a tube attached to a set of mirrors or prisms, by which an observer (typically in a submerged submarine or behind a high obstacle) can see things that are otherwise out of sight.
Tempo: the speed at which a passage of music is or should be played.
Microscope: an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times.
Popullar: liked, admired, or enjoyed by many people or by a particular person or group.
Step for step explanation: The energy from radiation can damage or break DNA molecules. If the damage is severe enough, cells can't replicate and the organism dies. Sometimes DNA can't be repaired, producing a mutation. Mutated DNA may result in tumors and affect an animal's ability to reproduce.
