Question

Match the two lists and choose the correct option.

	List I (vascular bundle types)		List II (Plants)
A	Collateral and open	1	Cucurbita stem
B	Radial	2	Ferns
C	Bicollateral	3	Maize root
D	Concentric	4	Sunflower

• A. A- 4, B- 3, C- 1, D- 2
  
• B. A- 3, B- 4, C- 1, D- 2
• C. A- 4, B- 3, C- 2, D- 1
• D. A- 4, B- 1, C- 3, D- 2

Answer 1

The correct option is A A- 4, B- 3, C- 1, D- 2

Collateral bundles are vascular bundles in which the phloem and xylem lie on the same radius, with the phloem located toward the periphery of the stem and the xylem toward the center. Collateral open vascular bundles are present in dicots, like sunflower.

Bicollateral vascular bundles have 2 patches of cambrium and one patch of xylem at the middle. This type of vascular bundles are found in plants of the family Cucurbitaceae and Solanaceae.

Concentric vascular bundles have one vascular element surrounding the other on all sides. These are mostly observed in ferns. These are of two types - leptocentric (Dracena and Yucca) and hydrocentric (Hydrilla).

Radial vascular bundle is observed in both dicot and monocot roots. Example- maize roots.