Population growth is the change in the number of INDIVIDUALS in a population over time.
The answer is an embryonic stage. This is the period of gestation right after the implantation, this is when the major organs of a baby are formed.
In the embryonic stage, <span>ectoderm is the outer layer that develops to a hair, teeth, brain and spinal cord. </span>
Atoms, molecules, cell membranes, then cell (in order from smallest to biggest).
The answer is : B) Inner Ear.