Question

Vascular bundles in monocotyledons are considered closed because

(a) there are no vessels with perforations

(b) xylem is surrounded all around by phloem

(c) a bundle sheath surrounds each bundle

(d) cambium is absent.

Answer 1

Ans: (d) cambium is absent.

Explanation: In monocots there is no secondary growth so, no need of vascular cambium. Vascular cambium is absent so monocot have closed vasculature.

Answer 2

Ans: (d) cambium is absent.