Answer:
A prokaryote is a simple, single-celled organism that lacks a nucleus and membrane-bound organelles.
Answer:
In my opinion, people smoke because they're "crazy" and need some "help."
They smoke maybe because the cigar is "good" or something...
They observe it, run tests on many different things, and do expirments
Genetic variation is advantageous because it enables some individuals and, therefore, a population, to survive despite a changing environment.
