Diffusion Doesn't Require Energy

question 21

Multiple Choice

Diffusion doesn't require energy. Why do plants expend energy in active transport to transport minerals into root hairs?

• A)Mineral concentrations in the soil are too low for diffusion.
• B)Mineral concentrations in the soil are too high for diffusion.
• C)Minerals are too large for diffusion.
• D)Minerals are strongly attracted to soil particles.