Diffusion doesn't require energy. Why do plants expend energy to actively transport minerals into root hairs?
A) Minerals are too large for diffusion.
B) Mineral concentrations in the soil are too high for diffusion.
C) Mineral concentrations in the soil are too low for diffusion.
D) Minerals are strongly attracted to soil particles.
C
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The purpose of a photosystem is to convert ____
a. light energy into chemical energy b. carbon dioxide into sugar c. light energy into sugar d. oxygen into carbon dioxide e. light into oxygen
__________, such as jellyfishes, corals, and sea anemones, are radially symmetrical. Fill in the blank(s) with the appropriate word(s)
Of the three biochemical pathways that muscle cells can use to generate ATP, which one is dependent on the activity of mitochondria?
The structural polysaccharide of fungal cell walls is the same polysaccharide found in insect
a. exoskeletons. b. endoskeletons. c. eyes. d. cartilage.