A) collateral
B) bicollateral
C) radial
D) amphicribral
Correct Answer: B
Solution :
Bicollateral vascular bundles are present in cucurbits, in which phloem is found on both sides of xylem. Parenchyma is most primitive type of permanent tissue. In hydrophytes (aquatic plants) parenchyma develops abundant of air spaces and are known as aerenchyma. Aerenchyma helps in floatation.
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