What are two things that can pass through a cell membrane which makes it selectively permeable?

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

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.

Fill in the blank with the best word to complete the sentence. white blood cells protect against and aid in blood clotting when injuries are sustained.