Which of the following statements is true? a. secondary consumers are always carnivores. b. as population density increases, competition for resources decreases. c. a sparrow and a caterpillar both live in the same tree. they share a niche. d. secondary consumers receive less energy from the food chain than primary consumers.

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.