Answer:
Natural selection causes changes in populations because of the differential reproductive success of genetically varied individuals. That's the correct answer, for the selections that you have provided. Therefore, the correct answer in the selections you have provided would be letter B above; that's the true one!
Answer: Density
Explanation: Density can be measured using mass and volume.
Ketamine could lead to these sorts of secondary effects. By taking this medication, the patient would be made more comfortable, especially in the surgical setting, but it could also lead to secretions that might make it more difficult for the patient to have a clear breathing pathway during the procedure.
HIV came become AIDS (acquired immunodeficiency syndrome) if not treated.