試題詳解

34. Lignin's role in plant transition from aquatic to terrestrial environments was to:

(A) protect early aquatic plants only in freshwater.

(B) allow plants to grow tall with rigid stems, providing structural support against gravity.

(C) serve as a cuticle component preventing any water loss.

(D) be primarily responsible for vibrant flower colors.

(E) significantly decrease photosynthetic efficiency.