Differentiate renewable and nonrenewable resources

Renewable resources are unlimited, meaning they can be used over and over again for various uses. Some examples are wind power and solar power. Non-renewable resources, like oil, coal, and natural gas, are harder to obtain and take longer to replenish in the environment.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).