Question #1e5aa
1 Answer
Human evolution is the gradual changes that occur due to natural genetic variations that become a continuing part of each generation.
Explanation:
"Evolution" biologically should not be confused with "Evolutionism", which is an extreme extrapolation of scanty data. Biological evolution is the process of change that can occur due to different environmental conditions over varying (usually long) periods of time.
One example would be acquired immunity from some diseases due to survival of progenitors. For example, while the disease small pox was an epidemic disease that killed huge numbers of people (as did the Bubonic Plague), the individuals with a natural immune defense who survived then passed the genetics that provided that defense on to their offspring. Thus, small pox immunity "evolved" in that group of humans.
We can confer that type of development against disease to many other ones by vaccination. A vaccination often imparts life-long immunity to a particular disease, which is a way of "short-cutting" the usual evolution process.
Other examples are changes in body type, skin pigmentation and hair that will change over time to adapt more suitably to a particular living environment and diet.
