Dogs of having a desirable coat color are bred with one another to produce more puppies with that same coat color.
The environment decides who survives and reproduces
Over the course of many generations, green beetles became extinct, and brown beetles have flourished.
Farmers raise corn that has been made virus-resistant by adding a gene
Organisms that are best adapted for their environment survive and reproduce.
Humans decide who reproduces
Tigers with a white coat are chosen to mate with one another. This produces more white tigers.
Main purpose is money
Angus cows are bred to increase muscle mass so that we can get more meat out of them
“Survival of the FITTEST”
Finches have developed different bird beaks because they eat different types of food
Dairy farmers look for the cows that can produce the most milk and only breed those cows.
Giraffes with short necks cannot get enough food. After a few generations, only the long neck giraffes have survived.
Dark colored moths have become more prevalent because they can camouflage against trees.
