How does water's high specific heat capacity benefit living organisms?

• A. It increases the rate of evaporation in organisms.
• B. It decreases the energy required for metabolic reactions.
• C. It allows organisms to maintain stable internal temperatures despite external temperature changes.
• D. It causes rapid temperature fluctuations in aquatic environments.

Answer: (C)

Verified step by step guidance

1. Understand the concept of specific heat capacity: Specific heat capacity is the amount of heat required to change the temperature of a substance by one degree Celsius. Water has a high specific heat capacity, meaning it can absorb or release a large amount of heat with little change in its own temperature.
2. Consider the implications for living organisms: Because water can absorb a lot of heat without a significant change in temperature, it helps stabilize the internal environment of organisms. This is crucial for maintaining homeostasis, which is the ability of organisms to keep their internal conditions stable.
3. Analyze the effect on metabolic reactions: Metabolic reactions are sensitive to temperature changes. Water's high specific heat capacity ensures that the temperature within cells remains relatively constant, allowing enzymes and other proteins to function optimally.
4. Evaluate the impact on aquatic environments: In aquatic environments, water's high specific heat capacity prevents rapid temperature fluctuations, providing a stable habitat for aquatic life. This stability is essential for the survival of many species.
5. Conclude with the overall benefit: The high specific heat capacity of water is beneficial because it allows organisms to maintain stable internal temperatures despite external temperature changes, supporting life processes and ecological balance.