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Questions and Answers
What is diffusion?
What is diffusion?
- The movement of substances from higher to lower concentration (correct)
- The movement of substances within the same concentration
- The movement of substances from lower to higher concentration
- The movement of substances independent of concentration
What factors affect the rate of diffusion?
What factors affect the rate of diffusion?
- Concentration gradient, size of the molecules, color of the substance, and shape of the container
- Concentration gradient, permeability of membrane, temperature, and pressure (correct)
- Concentration gradient, solubility of the substance, pressure, and size of the molecules
- Concentration gradient, presence of catalysts, color of the substance, and temperature
What is the typical speed at which a molecule can cross a typical plant cell?
What is the typical speed at which a molecule can cross a typical plant cell?
- About 50 micrometers in about 2.5 seconds (correct)
- About 75 micrometers in about 3 seconds
- About 25 micrometers in about 5 seconds
- About 100 micrometers in about 1 second
