Question

Discuss human impact as an agent of natural selection. Give examples.

Answer 1

Natural selection that favours the heritable trait that increase the survival chance of organism allowing the organism to reproduce more

An example about antibiotic resistance work

You may have antibiotic resistance .Bacterial infections in human are commonly treated with antibiotics .However ,their overuse and misuse .some pathogenic have become resistance some of these treatments .This is dangerous for humans because treatment that use to cure potentially fatal diseases are now less effective at all. How an antibiotics become less effective?

When you have an infection the multiplying pathogenic bacteria inside of you not all identical.Most of them are same but every now and again one of them are slightly different genetically identical they would react to their environment the same way and all will be harmed by same things.One harmful thing could wipe out entire species but their slightly genetic differences harmful conditions, like presence of antibiotic,might kill the most of the pathogenic bacteria but some may be better able to survive and thrive and make you I'll. Different environments favours different traits and so natural selection has taken place