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BIO NMDCAT Biological Importance of Water
nmdcat.online June 27, 2026

The primary biological significance of water’s high latent heat of fusion is that it

A. Allows organisms to supercool their tissues below the freezing point indefinitely
B. Protects living cells from freezing damage by releasing heat as water crystallizes
✓
C. Prevents any ice crystal formation inside living organisms
D. Decreases the density of the cytoplasm to match that of ice

📝 Explanation

As extracellular water begins to freeze, the phase transition from liquid to solid releases the latent heat of fusion. This local release of heat warms the immediate surroundings, slowing the rate of cooling and delaying the freezing of intracellular water, which is lethal.

📖 Additional Information

  • Allows organisms to supercool their tissues below the freezing point indefinitely
  • Protects living cells from freezing damage by releasing heat as water crystallizes
  • Prevents any ice crystal formation inside living organisms
  • Decreases the density of the cytoplasm to match that of ice

As extracellular water begins to freeze, the phase transition from liquid to solid releases the latent heat of fusion. This local release of heat warms the immediate surroundings, slowing the rate of cooling and delaying the freezing of intracellular water, which is lethal.

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