Which of these characters does/do not apply to the vascular bundle of monocot stem? I. Conjoint II. Endarch protoxylem III. Open IV. Phloem parenchyma is absent

Question

Which of these characters does/do not apply to the vascular bundle of monocot stem? I. Conjoint II. Endarch protoxylem III. Open IV. Phloem parenchyma is absent (A) I and II only (B) II and III only (C) III and IV only (D) III only

Tardigrade Admin · Accepted Answer

Vascular bundles of monocot stem are conjoint, collateral (xylem, phloem both present together on the same radius) but closed i.e. they lack cambium hence secondary growth is absent. Phloem consists of sieve tubes, companion cells and a few phloem fibres. Phloem parenchyma is absent.

Q. Which of these characters does/do not apply to the vascular bundle of monocot stem? I. Conjoint II. Endarch protoxylem III. Open IV. Phloem parenchyma is absent

I and II only

II and III only

III and IV only

III only

I and IV only

Vascular bundles of monocot stem are conjoint, collateral (xylem, phloem both present together on the same radius) but closed i.e. they lack cambium hence secondary growth is absent. Phloem consists of sieve tubes, companion cells and a few phloem fibres. Phloem parenchyma is absent.

Q. Which of these characters does/do not apply to the vascular bundle of monocot stem?
I. Conjoint II. Endarch protoxylem III. Open IV. Phloem parenchyma is absent