1.

Arrange the following plants in ascending order based on the number of xylem strands in their roots :(I) Trapa(II) Pisum(III) Castanea(IV) Nicotiana

A. I, IV, II, III
B. IV, III, I, II
C. III, IV, II, I
D. II, IV, III, I
Answer» B. IV, III, I, II


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