Which of the followung can be answered scientifically? a. should we just let the river flow where it wants? b. what can be done to stop erosion ? c is erosion control worth the financial costs? d. can planting cover crops reduce erosion?

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

natural resource systems. - third choice