Answer:
Contraction and relaxation of the heart is the function of the muscular system whereby illustrated by the pumping of the blood by the heart throughout the body. Though everyone is not aware, the constant contraction and relaxation of the muscles help fight gravity, that is why the muscular system is a great help in maintaining good posture.
The environmental hazard directly related to nuclear power production is the risk of radioactive contamination and potential nuclear accidents.
Nuclear power production involves the use of nuclear reactors to generate electricity. While nuclear power is a low-carbon energy source, there are unique environmental hazards associated with it. The primary concern is the potential release of radioactive materials into the environment.
Furthermore, the long-term storage and disposal of nuclear waste generated by nuclear power plants are ongoing environmental challenges. Radioactive waste materials remain hazardous for extended periods, requiring proper containment and management to prevent environmental contamination.
It's worth noting that with proper safety measures and regulations, the risks associated with nuclear power can be minimized. However, the potential for environmental hazards related to radioactive contamination and nuclear accidents is an inherent concern in nuclear power production.
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It differs due to the life cycle of each tree, and the very specific way the trees go.
B. gravitropism.
C. thigmatropism.
D. heliotropism.