Someone pls ! the egg +sperm leads to what what and what?

When inside the egg, both the egg and the sperm prepare for a genetic fusion. After this, the 23 chromosomes from the egg and the 23 chromosomes from the sperm fuse to generate the 1st cell that gives rise to new life, called the zygot

the correct answer is:

a population changes in response to a change in the environment.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.