They have half the chromosomes in body cells. One half are from one parent the other half is from the other parent.
Answer:
refraction
Explanation:
refraction happens when a wave passes from one medium to another at an angle
Answer:
The correct answer is B terpentation
Explanation:
Trepanation consisted on drilling a hole on a person's skull to relieve the pressure of blood after an injury and treat intercranial diseases. It is presumed this surgery exists from the Neolithic Age and has been done first by Egyptians, Greeks, Romans and Indians.