How does the structure of chromosomes differ in prokaryotes and eukaryotes?

Why has two different alleles for the same trait?

Interactions between organisms and their environment impact the organism’s overall population. the jaguar panthera onca is the largest cat in north america. it is found in areas across the southwest, including arizona, new mexico, and texas. it is a carnivore that has powerful jaws and sharp teeth and preys on fish, turtles, tapirs, and many smaller mammals. which shows the relationship between the jaguar and turtles?

Is a glacier nothing more than a huge mineral flowing downhill? be sure to defend your answer with facts.