Describe the significance of physical properties of water to organism.

  • Water has low viscosity; this allows for easy flow of water and easy transport of aquatic organisms
  • Water is transparent; this allows penetration of light for photosynthesis and visibility
  • Water has high surface tension that allows movement of animals on the surface of water and ascending of water through the xylem.
  • Water has high latent heat of vaporization; this allows cooling of organisms when sweat evaporates. It also prevents drying aquatic habitat during hot climate
  • Water has high latent heat of fusion; this prevent freezing of aquatic habitat during cold climate
  • Water has high specific heat capacity which prevent temperature rise or fall in an organism during hot or cold weather respectively
  • Water molecules have adhesive and cohesive forces; these create enough capillarity force for transport I narrow tubes of biological systems..
  • Water is a good solvent; it enables biological reactions and transport
  • Water is incompressible hence it is used in hydrostatic skeleton in lower animals such as earthworms.
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