Scientific investigations begin by asking questions that can be tested, measured, or both. Which question meets this criterion? What opinions do teenagers have about vaccines?
Do hand sanitizers decrease a person’s risk of a bacterial infection?
Is buying organic food an ethical choice?
How hard is it for people to reduce stress in their lives?

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?