What is the ultimate source of energy that drives a food chain?

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above

Two critical interventions to turn around the opioid crises are: