Bicollateral vascular bundles are present in_______.

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Cucurbita

Zea mays

Both 1 & 2

None of the above

answer is A.

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Detailed Solution

Concept: The Cucurbitaceae family has a bicollateral vascular bundle. In this family, the stem has a conjoint vascular bundle and two strands of phloem and one of xylem. phloem is present both on the inner and outer sides of the xylem.
The bicollateral vascular bundle is the conjoint vascular bundle in the stem having only one strand of xylem and two strands of the phloem. The phloem present in this vascular bundle, is found on the both outer side and the inner side of the xylem. Usually it is present in the stems of the Cucurbita or Cephalandra plants. It is the open vascular bundle.
Hence, option 1 is the correct answer.

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