Because of base pairing in DNA, the percentage of — F adenine molecules in DNA is about equal to the percentage of guanine molecules G adenine-thymine pairs in DNA is much greater than the percentage of cytosine-guanine pairs H adenine and guanine in DNA is about equal to the percentage of thymine and cytosine cytosine molecules in DNA is much greater than the percentage of guanine molecules

Plants grown in full sunlight produced more biomass, tillers and leaves, and allocated a larger proportion of their total production to roots than plants grown in shade. Thus, shading reduces the rate of growth, number of tillers, and ability to replace leaf area lost to herbivory for B. tectorum.

The shade-tolerant plants are capable of photosynthesis using light at such wavelengths. Shade-tolerant plants are thus adapted to be efficient energy-users. In simple terms, shade-tolerant plants grow broader, thinner leaves to catch more sunlight relative to the cost of producing the leaf.

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