Scientists believe that the earth's orbit gradually changes from being elliptical to being nearly circular and then back to elliptical in a period of about 100,000 years. this causes global climatic change. the more circular the earth's orbit, the less the difference in?

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a. changes in genetics in human populationsb. antibiotic resistance in bacteria populationsc. pesticide resistance in garden insectsd. changes in the color of the peppered moth population in england