The dependant variable would be the salmon, because they depend on the water and pollution levels to give a result.
Answer:
Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities. It stimulates muscle contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning.
Explanation:
Answer:
It's one time or maybe ttwo
The answer is chloroplasts