"A. labelling food supplies" and "B. monitoring water supplies" are both public health measures that have helped fight disease. Vaccinations are essential to public health.
Answer:
It’s A
Explanation:
Itw a because it does contain a nucleus
A gene pool is a collection of all the genes in a population. This can be any population - frogs in a pond, trees in a forest, or people in a town.
Traditionally the unit was the kilo-calorie but commonly just referred to as calorie. today's SI unit is the Joule...