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MEPS EXAM 1 QUESTIONS AND ANSWERS
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MEPS EXAM 1 QUESTIONS ANDANSWERS
Nonwoody, metabolically active plant portions contain - ANSWER 70% water.
Seeds can have as low as 5% water.
Total water loss from transpiration: 10^11 tons/year.
What are the properties of water? Answer: universal solvent and polar molecule.
- Hydrogen bonding and bound water.
Water's thermal properties include high specific heat, thermal conductivity, heat
of fusion, heat of vaporisation, and a high dielectric constant.
The physical properties of water include cohesion, surface tension, tensile
strength, and adhesion.
Tensile strength is the maximum tension that a continuous column of any
material can withstand without breaking.
Adhesion - ANSWER A significant role in the capillary ascent of water in tiny
diameter conduits.
Bulk flow - answer Caused by changes in water pressure
Diffusion - Answer Caused by differences in water concentrations.A solute
molecule moves directly from an area of high concentration to a region of low
concentration.
Fick's First Law - ANSWER The diffusion equation, J = -D * A * (delta)C * l-
1, applies to both solute and gas diffusion.
Osmosis - Answer Diffusion involves the movement of water across a
selectively permeable barrier and the controlled movement of solvent molecules
through a semi-permeable membrane.
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