Question

Intraxylary phloem may also be called as

• A. Internal phloem
• B. Included phloem
• C. Vestigial phloem
• D. None of the above

Answer 1

The correct option is A Internal phloem

In some eudicot families (Apocynaceae, Convolvulaceae, Cucurbitaceae, Solanaceae, Myrtaceae, Asteraceae), phloem develops on the inner side of the vascular cambium. Internal phloem or intraxylary phloem is mostly primary and begins differentiation later than the external phloem. In some families (Amaranthaceae, Nyctaginaceae, Salvadoraceae), the cambium forms inward strands or layers of phloem, embedded in the xylem. Such, phloem strands are called as included phloem or intraxylary phloem.
Thus, the correct answer is option A.