Vascular bundles in Cucurbita stem are

Bicollateral and open

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Bicollateral and closed

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Collateral and open

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Amphivasal

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Solution

The correct option is A Bicollateral and open
Bicollateral vascular bundles contain two patches of phloem on either sides of the xylem on the same radius. The outer phloem or external phloem remains towards the periphery of the central cylinder and inner or internal phloem remains towards the centre. Bicollateral vascular bundles are found in plants of family Cucurbitaceae and Solanaceae etc.
Cucurbita is a dicot, which has open vascular bundles, as cambium is present So, the correct answer is 'Bicollateral and open'

Suggest Corrections

	List I		List II
A	Radial vascular bundle	1	Cucurbita pepo
B	Collateral vascular bundle	2	Dracaena
C	Bicollateral vascular bundle	3	Roots of angiosperms
D	Amphicribral vascular bundle	4	Sunflower stem
E	Amphivasal vascular bundle	5	Fern