Wild salmon spend most of their lives in the ocean but return to freshwater rivers to spawn, or reproduce. Most wild salmon will only spawn in specific spawning grounds in the rivers in which they were born. The construction of hydroelectric dams in rivers has blocked the paths of some salmon returning to their spawning grounds. This has led to population declines. Which method would be most effective in preventing further wild salmon population declines caused by the construction of hydroelectric dams? A. monitoring genetic diversity by using netting to catch salmon and obtain genetic samples B. observing the migration patterns of wild salmon by tagging and tracking a small sample of fish C. establishing protected regions around wild salmon spawning grounds in specific rivers D. constructing passageways next to dams to allow salmon to swim around blocked rivers

Hurry i need your (100 points) 1) what are the responsibilities of the region of the brain highlighted below? (picture located below) the highlighted portion is at the rear base of the brain, behind the brain stem. regulating homeostasis, hunger and eating, thirst and drinking, and many other functions of basic survival. coordinating movement and balance by using information from sensory nerves, including hand-eye coordination. controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities. regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing. 2)which of the following systems or structures is correctly paired with its function? neurons - brain cells that control thoughts, calculations, and memory cerebral cortex - portion of the brain that controls involuntary body movement peripheral nervous system - carries impulses to and from the central nervous system central nervous system - carries information from the nerves to the muscles and glands

Which measure of an earthquake depends on how close you are to the focus?

Which is abiotic? a. tree sap b. insect c. sunlight d. wood table