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Questions and Answers
Why is diffusion only efficient over small distances?
Why is diffusion only efficient over small distances?
- Diffusion is faster in smaller organisms
- The time it takes to diffuse is proportional to the square of the distance (correct)
- Diffusion is hindered by large molecules in longer distances
- Diffusion is more effective in a fluid-like circulatory system
In which animals can cells exchange materials directly with the surrounding medium?
In which animals can cells exchange materials directly with the surrounding medium?
- Aquatic animals
- Large animals with complex circulatory systems
- Small or thin animals (correct)
- Animals with specialized exchange organs
How do most animals exchange materials with the environment?
How do most animals exchange materials with the environment?
- By utilizing specialized exchange organs
- By diffusion through the skin
- Through direct cellular exchange
- Via a fluid-like circulatory system (correct)
